711920389 has 4 divisors (see below), whose sum is σ = 712017900. Its totient is φ = 711822880.

The previous prime is 711920387. The next prime is 711920393. The reversal of 711920389 is 983029117.

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 242331489 + 469588900 = 15567^2 + 21670^2 .

It is a cyclic number.

It is not a de Polignac number, because 711920389 - 2¹ = 711920387 is a prime.

It is a super-2 number, since 2×711920389² = 1013661280547822642, 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 (711920387) 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, 36832 + ... + 52729.

It is an arithmetic number, because the mean of its divisors is an integer number (178004475).

Almost surely, 2^711920389 is an apocalyptic number.

It is an amenable number.

711920389 is a deficient number, since it is larger than the sum of its proper divisors (97511).

711920389 is an equidigital number, since it uses as much as digits as its factorization.

711920389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97510.

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 711920389 is about 26681.8363123680. The cubic root of 711920389 is about 892.9157367133.

The spelling of 711920389 in words is "seven hundred eleven million, nine hundred twenty thousand, three hundred eighty-nine".