38997712907 has 4 divisors (see below), whose sum is σ = 39046644336. Its totient is φ = 38948781480.

The previous prime is 38997712891. The next prime is 38997712927. The reversal of 38997712907 is 70921779983.

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

It is a cyclic number.

It is not a de Polignac number, because 38997712907 - 2⁴ = 38997712891 is a prime.

It is a super-2 number, since 2×38997712907² (a number of 22 digits) contains 22 as substring.

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 38997712907.

It is not an unprimeable number, because it can be changed into a prime (38997712927) 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, 24464519 + ... + 24466112.

It is an arithmetic number, because the mean of its divisors is an integer number (9761661084).

Almost surely, 2^38997712907 is an apocalyptic number.

38997712907 is a deficient number, since it is larger than the sum of its proper divisors (48931429).

38997712907 is an equidigital number, since it uses as much as digits as its factorization.

38997712907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48931428.

The product of its (nonzero) digits is 12002256, while the sum is 62.

The spelling of 38997712907 in words is "thirty-eight billion, nine hundred ninety-seven million, seven hundred twelve thousand, nine hundred seven".