82978373 has 2 divisors, whose sum is σ = 82978374. Its totient is φ = 82978372.

The previous prime is 82978369. The next prime is 82978391. The reversal of 82978373 is 37387928.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68591524 + 14386849 = 8282^2 + 3793^2 .

It is a cyclic number.

It is not a de Polignac number, because 82978373 - 2² = 82978369 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82978673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41489186 + 41489187.

It is an arithmetic number, because the mean of its divisors is an integer number (41489187).

Almost surely, 2^82978373 is an apocalyptic number.

It is an amenable number.

82978373 is a deficient number, since it is larger than the sum of its proper divisors (1).

82978373 is an equidigital number, since it uses as much as digits as its factorization.

82978373 is an evil number, because the sum of its binary digits is even.

The product of its digits is 508032, while the sum is 47.

The square root of 82978373 is about 9109.2465659900. The cubic root of 82978373 is about 436.1691769056.

The spelling of 82978373 in words is "eighty-two million, nine hundred seventy-eight thousand, three hundred seventy-three".