845012731 has 2 divisors, whose sum is σ = 845012732. Its totient is φ = 845012730.

The previous prime is 845012723. The next prime is 845012797. The reversal of 845012731 is 137210548.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 845012731 - 2³ = 845012723 is a prime.

It is a super-2 number, since 2×845012731² = 1428093031104156722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 845012693 and 845012702.

It is not a weakly prime, because it can be changed into another prime (845018731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422506365 + 422506366.

It is an arithmetic number, because the mean of its divisors is an integer number (422506366).

Almost surely, 2^845012731 is an apocalyptic number.

845012731 is a deficient number, since it is larger than the sum of its proper divisors (1).

845012731 is an equidigital number, since it uses as much as digits as its factorization.

845012731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 845012731 is about 29069.1026865296. The cubic root of 845012731 is about 945.4119424951.

The spelling of 845012731 in words is "eight hundred forty-five million, twelve thousand, seven hundred thirty-one".