3885657731 has 2 divisors, whose sum is σ = 3885657732. Its totient is φ = 3885657730.

The previous prime is 3885657709. The next prime is 3885657761. The reversal of 3885657731 is 1377565883.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3885657731 - 2⁶ = 3885657667 is a prime.

It is a super-2 number, since 2×3885657731² = 30196672004960136722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3885657761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1942828865 + 1942828866.

It is an arithmetic number, because the mean of its divisors is an integer number (1942828866).

Almost surely, 2^3885657731 is an apocalyptic number.

3885657731 is a deficient number, since it is larger than the sum of its proper divisors (1).

3885657731 is an equidigital number, since it uses as much as digits as its factorization.

3885657731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4233600, while the sum is 53.

The square root of 3885657731 is about 62335.0441645789. The cubic root of 3885657731 is about 1572.1290075944.

The spelling of 3885657731 in words is "three billion, eight hundred eighty-five million, six hundred fifty-seven thousand, seven hundred thirty-one".