38720033897 has 4 divisors (see below), whose sum is σ = 38893666560. Its totient is φ = 38546401236.

The previous prime is 38720033887. The next prime is 38720033903. The reversal of 38720033897 is 79833002783.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 79833002783 = 23 ⋅3471000121.

It is a cyclic number.

It is not a de Polignac number, because 38720033897 - 2²⁰ = 38718985321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38720033827) 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, 86815997 + ... + 86816442.

It is an arithmetic number, because the mean of its divisors is an integer number (9723416640).

Almost surely, 2^38720033897 is an apocalyptic number.

It is an amenable number.

38720033897 is a deficient number, since it is larger than the sum of its proper divisors (173632663).

38720033897 is a wasteful number, since it uses less digits than its factorization.

38720033897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173632662.

The product of its (nonzero) digits is 1524096, while the sum is 50.

The spelling of 38720033897 in words is "thirty-eight billion, seven hundred twenty million, thirty-three thousand, eight hundred ninety-seven".