83415881 has 2 divisors, whose sum is σ = 83415882. Its totient is φ = 83415880.

The previous prime is 83415877. The next prime is 83415887. The reversal of 83415881 is 18851438.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46022656 + 37393225 = 6784^2 + 6115^2 .

It is a cyclic number.

It is not a de Polignac number, because 83415881 - 2² = 83415877 is a prime.

It is a super-2 number, since 2×83415881² = 13916418406012322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (83415887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41707940 + 41707941.

It is an arithmetic number, because the mean of its divisors is an integer number (41707941).

Almost surely, 2^83415881 is an apocalyptic number.

It is an amenable number.

83415881 is a deficient number, since it is larger than the sum of its proper divisors (1).

83415881 is an equidigital number, since it uses as much as digits as its factorization.

83415881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30720, while the sum is 38.

The square root of 83415881 is about 9133.2294945435. The cubic root of 83415881 is about 436.9344088309.

The spelling of 83415881 in words is "eighty-three million, four hundred fifteen thousand, eight hundred eighty-one".