2931728623 has 4 divisors (see below), whose sum is σ = 2953128240. Its totient is φ = 2910329008.

The previous prime is 2931728617. The next prime is 2931728627. The reversal of 2931728623 is 3268271392.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2931728623 - 2¹⁷ = 2931597551 is a prime.

It is a super-2 number, since 2×2931728623² = 17190065437834952258, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2931728623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2931728627) 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, 10699603 + ... + 10699876.

It is an arithmetic number, because the mean of its divisors is an integer number (738282060).

Almost surely, 2^2931728623 is an apocalyptic number.

2931728623 is a deficient number, since it is larger than the sum of its proper divisors (21399617).

2931728623 is a wasteful number, since it uses less digits than its factorization.

2931728623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21399616.

The product of its digits is 217728, while the sum is 43.

The square root of 2931728623 is about 54145.4395401866. The cubic root of 2931728623 is about 1431.2250286370.

The spelling of 2931728623 in words is "two billion, nine hundred thirty-one million, seven hundred twenty-eight thousand, six hundred twenty-three".