391967023 has 12 divisors (see below), whose sum is σ = 457532400. Its totient is φ = 335657448.

The previous prime is 391966969. The next prime is 391967033. The reversal of 391967023 is 320769193.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is not a de Polignac number, because 391967023 - 2²⁵ = 358412591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (391967033) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 366133 + ... + 367201.

It is an arithmetic number, because the mean of its divisors is an integer number (38127700).

Almost surely, 2^391967023 is an apocalyptic number.

391967023 is a deficient number, since it is larger than the sum of its proper divisors (65565377).

391967023 is an frugal number, since it uses more digits than its factorization.

391967023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2159 (or 1076 counting only the distinct ones).

The product of its (nonzero) digits is 61236, while the sum is 40.

The square root of 391967023 is about 19798.1570606963. The cubic root of 391967023 is about 731.8406188229.

The spelling of 391967023 in words is "three hundred ninety-one million, nine hundred sixty-seven thousand, twenty-three".