912869813 has 4 divisors (see below), whose sum is σ = 922280940. Its totient is φ = 903458688.

The previous prime is 912869761. The next prime is 912869857. The reversal of 912869813 is 318968219.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 286218724 + 626651089 = 16918^2 + 25033^2 .

It is a cyclic number.

It is not a de Polignac number, because 912869813 - 2⁸ = 912869557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (912869863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4705418 + ... + 4705611.

It is an arithmetic number, because the mean of its divisors is an integer number (230570235).

Almost surely, 2^912869813 is an apocalyptic number.

It is an amenable number.

912869813 is a deficient number, since it is larger than the sum of its proper divisors (9411127).

912869813 is an equidigital number, since it uses as much as digits as its factorization.

912869813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9411126.

The product of its digits is 186624, while the sum is 47.

The square root of 912869813 is about 30213.7355022513. The cubic root of 912869813 is about 970.0697200746.

The spelling of 912869813 in words is "nine hundred twelve million, eight hundred sixty-nine thousand, eight hundred thirteen".