842312407 has 2 divisors, whose sum is σ = 842312408. Its totient is φ = 842312406.

The previous prime is 842312381. The next prime is 842312431. The reversal of 842312407 is 704213248.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-842312407 is a prime.

It is a super-2 number, since 2×842312407² = 1418980381972267298, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (842312507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 421156203 + 421156204.

It is an arithmetic number, because the mean of its divisors is an integer number (421156204).

Almost surely, 2^842312407 is an apocalyptic number.

842312407 is a deficient number, since it is larger than the sum of its proper divisors (1).

842312407 is an equidigital number, since it uses as much as digits as its factorization.

842312407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10752, while the sum is 31.

The square root of 842312407 is about 29022.6188859655. The cubic root of 842312407 is about 944.4038145807.

The spelling of 842312407 in words is "eight hundred forty-two million, three hundred twelve thousand, four hundred seven".