320072691 has 8 divisors (see below), whose sum is σ = 437172624. Its totient is φ = 208177280.

The previous prime is 320072677. The next prime is 320072707. The reversal of 320072691 is 196270023.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 320072691 - 2¹¹ = 320070643 is a prime.

It is not an unprimeable number, because it can be changed into a prime (320072611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1300986 + ... + 1301231.

It is an arithmetic number, because the mean of its divisors is an integer number (54646578).

Almost surely, 2^320072691 is an apocalyptic number.

320072691 is a deficient number, since it is larger than the sum of its proper divisors (117099933).

320072691 is a wasteful number, since it uses less digits than its factorization.

320072691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2602261.

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 320072691 is about 17890.5754798441. The cubic root of 320072691 is about 684.0421663585.

The spelling of 320072691 in words is "three hundred twenty million, seventy-two thousand, six hundred ninety-one".