137903907 has 4 divisors (see below), whose sum is σ = 183871880. Its totient is φ = 91935936.

The previous prime is 137903897. The next prime is 137903911. The reversal of 137903907 is 709309731.

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

It is not a de Polignac number, because 137903907 - 2⁴ = 137903891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (137903977) 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, 22983982 + ... + 22983987.

It is an arithmetic number, because the mean of its divisors is an integer number (45967970).

Almost surely, 2^137903907 is an apocalyptic number.

137903907 is a deficient number, since it is larger than the sum of its proper divisors (45967973).

137903907 is an equidigital number, since it uses as much as digits as its factorization.

137903907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45967972.

The product of its (nonzero) digits is 35721, while the sum is 39.

The square root of 137903907 is about 11743.2494225406. The cubic root of 137903907 is about 516.6449517524.

The spelling of 137903907 in words is "one hundred thirty-seven million, nine hundred three thousand, nine hundred seven".