82474391 has 2 divisors, whose sum is σ = 82474392. Its totient is φ = 82474390.

The previous prime is 82474367. The next prime is 82474397. The reversal of 82474391 is 19347428.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 82474391 - 2²⁶ = 15365527 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82474397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41237195 + 41237196.

It is an arithmetic number, because the mean of its divisors is an integer number (41237196).

Almost surely, 2^82474391 is an apocalyptic number.

82474391 is a deficient number, since it is larger than the sum of its proper divisors (1).

82474391 is an equidigital number, since it uses as much as digits as its factorization.

82474391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 38.

The square root of 82474391 is about 9081.5412238232. The cubic root of 82474391 is about 435.2843360579.

The spelling of 82474391 in words is "eighty-two million, four hundred seventy-four thousand, three hundred ninety-one".