672720697 has 4 divisors (see below), whose sum is σ = 733877136. Its totient is φ = 611564260.

The previous prime is 672720691. The next prime is 672720757. The reversal of 672720697 is 796027276.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-672720697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (672720691) 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, 30578203 + ... + 30578224.

It is an arithmetic number, because the mean of its divisors is an integer number (183469284).

Almost surely, 2^672720697 is an apocalyptic number.

It is an amenable number.

672720697 is a deficient number, since it is larger than the sum of its proper divisors (61156439).

672720697 is a wasteful number, since it uses less digits than its factorization.

672720697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61156438.

The product of its (nonzero) digits is 444528, while the sum is 46.

The square root of 672720697 is about 25936.8598137862. The cubic root of 672720697 is about 876.2168417309.

The spelling of 672720697 in words is "six hundred seventy-two million, seven hundred twenty thousand, six hundred ninety-seven".