137642737 has 4 divisors (see below), whose sum is σ = 137670256. Its totient is φ = 137615220.

The previous prime is 137642731. The next prime is 137642753. The reversal of 137642737 is 737246731.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 137642737 - 2¹¹ = 137640689 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 137642737.

It is not an unprimeable number, because it can be changed into a prime (137642731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3903 + ... + 17044.

It is an arithmetic number, because the mean of its divisors is an integer number (34417564).

Almost surely, 2^137642737 is an apocalyptic number.

It is an amenable number.

137642737 is a deficient number, since it is larger than the sum of its proper divisors (27519).

137642737 is an equidigital number, since it uses as much as digits as its factorization.

137642737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27518.

The product of its digits is 148176, while the sum is 40.

The square root of 137642737 is about 11732.1241469736. The cubic root of 137642737 is about 516.3185954381.

The spelling of 137642737 in words is "one hundred thirty-seven million, six hundred forty-two thousand, seven hundred thirty-seven".