84997383931 has 2 divisors, whose sum is σ = 84997383932. Its totient is φ = 84997383930.

The previous prime is 84997383923. The next prime is 84997383953. The reversal of 84997383931 is 13938379948.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84997383931 - 2³ = 84997383923 is a prime.

It is a super-2 number, since 2×84997383931² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (84997383631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42498691965 + 42498691966.

It is an arithmetic number, because the mean of its divisors is an integer number (42498691966).

Almost surely, 2^84997383931 is an apocalyptic number.

84997383931 is a deficient number, since it is larger than the sum of its proper divisors (1).

84997383931 is an equidigital number, since it uses as much as digits as its factorization.

84997383931 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35271936, while the sum is 64.

The spelling of 84997383931 in words is "eighty-four billion, nine hundred ninety-seven million, three hundred eighty-three thousand, nine hundred thirty-one".