38983897631 has 4 divisors (see below), whose sum is σ = 44553025872. Its totient is φ = 33414769392.

The previous prime is 38983897621. The next prime is 38983897643. The reversal of 38983897631 is 13679838983.

38983897631 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13679838983 = 30509 ⋅448387.

It is a cyclic number.

It is not a de Polignac number, because 38983897631 - 2¹⁴ = 38983881247 is a prime.

It is a super-2 number, since 2×38983897631² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38983897621) 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, 2784564110 + ... + 2784564123.

It is an arithmetic number, because the mean of its divisors is an integer number (11138256468).

Almost surely, 2^38983897631 is an apocalyptic number.

38983897631 is a deficient number, since it is larger than the sum of its proper divisors (5569128241).

38983897631 is an equidigital number, since it uses as much as digits as its factorization.

38983897631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5569128240.

The product of its digits is 47029248, while the sum is 65.

The spelling of 38983897631 in words is "thirty-eight billion, nine hundred eighty-three million, eight hundred ninety-seven thousand, six hundred thirty-one".