82474397 has 2 divisors, whose sum is σ = 82474398. Its totient is φ = 82474396.

The previous prime is 82474391. The next prime is 82474439. The reversal of 82474397 is 79347428.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75446596 + 7027801 = 8686^2 + 2651^2 .

It is a cyclic number.

It is not a de Polignac number, because 82474397 - 2²⁰ = 81425821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82474391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41237198 + 41237199.

It is an arithmetic number, because the mean of its divisors is an integer number (41237199).

Almost surely, 2^82474397 is an apocalyptic number.

It is an amenable number.

82474397 is a deficient number, since it is larger than the sum of its proper divisors (1).

82474397 is an equidigital number, since it uses as much as digits as its factorization.

82474397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 338688, while the sum is 44.

The square root of 82474397 is about 9081.5415541636. The cubic root of 82474397 is about 435.2843466136.

The spelling of 82474397 in words is "eighty-two million, four hundred seventy-four thousand, three hundred ninety-seven".