83021137 has 2 divisors, whose sum is σ = 83021138. Its totient is φ = 83021136.

The previous prime is 83021117. The next prime is 83021153. The reversal of 83021137 is 73112038.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83010321 + 10816 = 9111^2 + 104^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83021137 is a prime.

It is not a weakly prime, because it can be changed into another prime (83021117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41510568 + 41510569.

It is an arithmetic number, because the mean of its divisors is an integer number (41510569).

Almost surely, 2^83021137 is an apocalyptic number.

It is an amenable number.

83021137 is a deficient number, since it is larger than the sum of its proper divisors (1).

83021137 is an equidigital number, since it uses as much as digits as its factorization.

83021137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 83021137 is about 9111.5935488805. The cubic root of 83021137 is about 436.2440925520.

Subtracting from 83021137 its reverse (73112038), we obtain a palindrome (9909099).

The spelling of 83021137 in words is "eighty-three million, twenty-one thousand, one hundred thirty-seven".