712143391 has 4 divisors (see below), whose sum is σ = 729512784. Its totient is φ = 694774000.

The previous prime is 712143361. The next prime is 712143407. The reversal of 712143391 is 193341217.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 193341217 = 6967 ⋅27751.

It is a cyclic number.

It is not a de Polignac number, because 712143391 - 2¹¹ = 712141343 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 (712143301) 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, 8684635 + ... + 8684716.

It is an arithmetic number, because the mean of its divisors is an integer number (182378196).

Almost surely, 2^712143391 is an apocalyptic number.

712143391 is a deficient number, since it is larger than the sum of its proper divisors (17369393).

712143391 is a wasteful number, since it uses less digits than its factorization.

712143391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17369392.

The product of its digits is 4536, while the sum is 31.

The square root of 712143391 is about 26686.0148954466. The cubic root of 712143391 is about 893.0089593127.

The spelling of 712143391 in words is "seven hundred twelve million, one hundred forty-three thousand, three hundred ninety-one".