442680431 has 2 divisors, whose sum is σ = 442680432. Its totient is φ = 442680430.

The previous prime is 442680419. The next prime is 442680437. The reversal of 442680431 is 134086244.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-442680431 is a prime.

It is a super-2 number, since 2×442680431² = 391931927980691522, which contains 22 as substring.

It is equal to p_23485505 and since 442680431 and 23485505 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (442680437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221340215 + 221340216.

It is an arithmetic number, because the mean of its divisors is an integer number (221340216).

Almost surely, 2^442680431 is an apocalyptic number.

442680431 is a deficient number, since it is larger than the sum of its proper divisors (1).

442680431 is an equidigital number, since it uses as much as digits as its factorization.

442680431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18432, while the sum is 32.

The square root of 442680431 is about 21039.9722195634. The cubic root of 442680431 is about 762.1318439873.

The spelling of 442680431 in words is "four hundred forty-two million, six hundred eighty thousand, four hundred thirty-one".