1045621623 has 16 divisors (see below), whose sum is σ = 1471075200. Its totient is φ = 658801440.

The previous prime is 1045621613. The next prime is 1045621627. The reversal of 1045621623 is 3261265401.

It is not a de Polignac number, because 1045621623 - 2¹⁰ = 1045620599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1045621627) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1993 + ... + 45773.

It is an arithmetic number, because the mean of its divisors is an integer number (91942200).

Almost surely, 2^1045621623 is an apocalyptic number.

1045621623 is a deficient number, since it is larger than the sum of its proper divisors (425453577).

1045621623 is a wasteful number, since it uses less digits than its factorization.

1045621623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44222.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 1045621623 is about 32336.0730918273. The cubic root of 1045621623 is about 1014.9816373359.

The spelling of 1045621623 in words is "one billion, forty-five million, six hundred twenty-one thousand, six hundred twenty-three".