672394709 has 6 divisors (see below), whose sum is σ = 782173494. Its totient is φ = 576338280.

The previous prime is 672394691. The next prime is 672394717. The reversal of 672394709 is 907493276.

It can be written as a sum of positive squares in only one way, i.e., 651372484 + 21022225 = 25522^2 + 4585^2 .

It is a de Polignac number, because none of the positive numbers 2^k-672394709 is a prime.

It is a super-2 number, since 2×672394709² = 904229289382389362, 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 (672394759) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6861122 + ... + 6861219.

It is an arithmetic number, because the mean of its divisors is an integer number (130362249).

Almost surely, 2^672394709 is an apocalyptic number.

It is an amenable number.

672394709 is a deficient number, since it is larger than the sum of its proper divisors (109778785).

672394709 is a wasteful number, since it uses less digits than its factorization.

672394709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13722355 (or 13722348 counting only the distinct ones).

The product of its (nonzero) digits is 571536, while the sum is 47.

The square root of 672394709 is about 25930.5747911611. The cubic root of 672394709 is about 876.0752860415.

The spelling of 672394709 in words is "six hundred seventy-two million, three hundred ninety-four thousand, seven hundred nine".