82921913 has 2 divisors, whose sum is σ = 82921914. Its totient is φ = 82921912.

The previous prime is 82921873. The next prime is 82921919. The reversal of 82921913 is 31912928.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82391929 + 529984 = 9077^2 + 728^2 .

It is a cyclic number.

It is not a de Polignac number, because 82921913 - 2¹⁶ = 82856377 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (82921919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41460956 + 41460957.

It is an arithmetic number, because the mean of its divisors is an integer number (41460957).

Almost surely, 2^82921913 is an apocalyptic number.

It is an amenable number.

82921913 is a deficient number, since it is larger than the sum of its proper divisors (1).

82921913 is an equidigital number, since it uses as much as digits as its factorization.

82921913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 35.

The square root of 82921913 is about 9106.1469898086. The cubic root of 82921913 is about 436.0702286363.

The spelling of 82921913 in words is "eighty-two million, nine hundred twenty-one thousand, nine hundred thirteen".