83404640731 has 2 divisors, whose sum is σ = 83404640732. Its totient is φ = 83404640730.

The previous prime is 83404640719. The next prime is 83404640741. The reversal of 83404640731 is 13704640438.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 83404640731 - 2⁵ = 83404640699 is a prime.

It is a super-2 number, since 2×83404640731² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (83404640741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41702320365 + 41702320366.

It is an arithmetic number, because the mean of its divisors is an integer number (41702320366).

Almost surely, 2^83404640731 is an apocalyptic number.

83404640731 is a deficient number, since it is larger than the sum of its proper divisors (1).

83404640731 is an equidigital number, since it uses as much as digits as its factorization.

83404640731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 193536, while the sum is 40.

The spelling of 83404640731 in words is "eighty-three billion, four hundred four million, six hundred forty thousand, seven hundred thirty-one".