712028861 has 4 divisors (see below), whose sum is σ = 712107900. Its totient is φ = 711949824.

The previous prime is 712028773. The next prime is 712028869. The reversal of 712028861 is 168820217.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 426216025 + 285812836 = 20645^2 + 16906^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-712028861 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 (712028869) 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, 23966 + ... + 44703.

It is an arithmetic number, because the mean of its divisors is an integer number (178026975).

Almost surely, 2^712028861 is an apocalyptic number.

It is an amenable number.

712028861 is a deficient number, since it is larger than the sum of its proper divisors (79039).

712028861 is a wasteful number, since it uses less digits than its factorization.

712028861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79038.

The product of its (nonzero) digits is 10752, while the sum is 35.

The square root of 712028861 is about 26683.8689286243. The cubic root of 712028861 is about 892.9610842168.

The spelling of 712028861 in words is "seven hundred twelve million, twenty-eight thousand, eight hundred sixty-one".