712690221 has 4 divisors (see below), whose sum is σ = 950253632. Its totient is φ = 475126812.

The previous prime is 712690219. The next prime is 712690229. The reversal of 712690221 is 122096217.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 122096217 = 3 ⋅40698739.

It is not a de Polignac number, because 712690221 - 2¹ = 712690219 is a prime.

It is a super-2 number, since 2×712690221² = 1015854702218057682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (712690229) 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, 118781701 + ... + 118781706.

It is an arithmetic number, because the mean of its divisors is an integer number (237563408).

Almost surely, 2^712690221 is an apocalyptic number.

It is an amenable number.

712690221 is a deficient number, since it is larger than the sum of its proper divisors (237563411).

712690221 is a wasteful number, since it uses less digits than its factorization.

712690221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237563410.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 712690221 is about 26696.2585580826. The cubic root of 712690221 is about 893.2374709485.

The spelling of 712690221 in words is "seven hundred twelve million, six hundred ninety thousand, two hundred twenty-one".