137640039 has 4 divisors (see below), whose sum is σ = 183520056. Its totient is φ = 91760024.

The previous prime is 137640029. The next prime is 137640049. The reversal of 137640039 is 930046731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 930046731 = 3 ⋅310015577.

It is an interprime number because it is at equal distance from previous prime (137640029) and next prime (137640049).

It is a cyclic number.

It is not a de Polignac number, because 137640039 - 2¹¹ = 137637991 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 137639991 and 137640009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137640029) 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, 22940004 + ... + 22940009.

It is an arithmetic number, because the mean of its divisors is an integer number (45880014).

Almost surely, 2^137640039 is an apocalyptic number.

137640039 is a deficient number, since it is larger than the sum of its proper divisors (45880017).

137640039 is an equidigital number, since it uses as much as digits as its factorization.

137640039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45880016.

The product of its (nonzero) digits is 13608, while the sum is 33.

The square root of 137640039 is about 11732.0091629695. The cubic root of 137640039 is about 516.3152218816.

The spelling of 137640039 in words is "one hundred thirty-seven million, six hundred forty thousand, thirty-nine".