137451961 has 4 divisors (see below), whose sum is σ = 137499124. Its totient is φ = 137404800.

The previous prime is 137451959. The next prime is 137451989. The reversal of 137451961 is 169154731.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 169154731 = 71 ⋅2382461.

It can be written as a sum of positive squares in 2 ways, for example, as 24157225 + 113294736 = 4915^2 + 10644^2 .

It is a cyclic number.

It is not a de Polignac number, because 137451961 - 2¹ = 137451959 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 137451961.

It is not an unprimeable number, because it can be changed into a prime (137451991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18900 + ... + 25141.

It is an arithmetic number, because the mean of its divisors is an integer number (34374781).

Almost surely, 2^137451961 is an apocalyptic number.

It is an amenable number.

137451961 is a deficient number, since it is larger than the sum of its proper divisors (47163).

137451961 is an equidigital number, since it uses as much as digits as its factorization.

137451961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47162.

The product of its digits is 22680, while the sum is 37.

The square root of 137451961 is about 11723.9908307709. The cubic root of 137451961 is about 516.0799419940.

It can be divided in two parts, 1374 and 51961, that added together give a palindrome (53335).

The spelling of 137451961 in words is "one hundred thirty-seven million, four hundred fifty-one thousand, nine hundred sixty-one".