712123691 has 8 divisors (see below), whose sum is σ = 717509184. Its totient is φ = 706750920.

The previous prime is 712123679. The next prime is 712123697. The reversal of 712123691 is 196321217.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 712123691 - 2¹⁸ = 711861547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (712123697) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129500 + ... + 134886.

It is an arithmetic number, because the mean of its divisors is an integer number (89688648).

Almost surely, 2^712123691 is an apocalyptic number.

712123691 is a deficient number, since it is larger than the sum of its proper divisors (5385493).

712123691 is a wasteful number, since it uses less digits than its factorization.

712123691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6361.

The product of its digits is 4536, while the sum is 32.

The square root of 712123691 is about 26685.6457857028. The cubic root of 712123691 is about 893.0007248107. Note that the first 3 decimals are identical.

The spelling of 712123691 in words is "seven hundred twelve million, one hundred twenty-three thousand, six hundred ninety-one".