709814981 has 4 divisors (see below), whose sum is σ = 709878912. Its totient is φ = 709751052.

The previous prime is 709814929. The next prime is 709815023. The reversal of 709814981 is 189418907.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 709814981 - 2²⁶ = 642706117 is a prime.

It is a super-2 number, since 2×709814981² = 1007674614504060722, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (709814081) 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, 10511 + ... + 39116.

It is an arithmetic number, because the mean of its divisors is an integer number (177469728).

Almost surely, 2^709814981 is an apocalyptic number.

It is an amenable number.

709814981 is a deficient number, since it is larger than the sum of its proper divisors (63931).

709814981 is a wasteful number, since it uses less digits than its factorization.

709814981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63930.

The product of its (nonzero) digits is 145152, while the sum is 47.

The square root of 709814981 is about 26642.3531430690. The cubic root of 709814981 is about 892.0346418373.

The spelling of 709814981 in words is "seven hundred nine million, eight hundred fourteen thousand, nine hundred eighty-one".