153481949 has 4 divisors (see below), whose sum is σ = 158774460. Its totient is φ = 148189440.

The previous prime is 153481927. The next prime is 153481963. The reversal of 153481949 is 949184351.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 103327225 + 50154724 = 10165^2 + 7082^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-153481949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (153481249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2646212 + ... + 2646269.

It is an arithmetic number, because the mean of its divisors is an integer number (39693615).

Almost surely, 2^153481949 is an apocalyptic number.

It is an amenable number.

153481949 is a deficient number, since it is larger than the sum of its proper divisors (5292511).

153481949 is an equidigital number, since it uses as much as digits as its factorization.

153481949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5292510.

The product of its digits is 155520, while the sum is 44.

The square root of 153481949 is about 12388.7831928725. The cubic root of 153481949 is about 535.4091248512.

The spelling of 153481949 in words is "one hundred fifty-three million, four hundred eighty-one thousand, nine hundred forty-nine".