84374431 has 2 divisors, whose sum is σ = 84374432. Its totient is φ = 84374430.

The previous prime is 84374377. The next prime is 84374443. The reversal of 84374431 is 13447348.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84374431 - 2²⁵ = 50819999 is a prime.

It is a super-2 number, since 2×84374431² = 14238089213147522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84374461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42187215 + 42187216.

It is an arithmetic number, because the mean of its divisors is an integer number (42187216).

Almost surely, 2^84374431 is an apocalyptic number.

84374431 is a deficient number, since it is larger than the sum of its proper divisors (1).

84374431 is an equidigital number, since it uses as much as digits as its factorization.

84374431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32256, while the sum is 34.

The square root of 84374431 is about 9185.5555629477. Note that the first 4 decimals coincide. The cubic root of 84374431 is about 438.6016747943.

The spelling of 84374431 in words is "eighty-four million, three hundred seventy-four thousand, four hundred thirty-one".