1321748923 has 16 divisors (see below), whose sum is σ = 1459752192. Its totient is φ = 1186780000.

The previous prime is 1321748893. The next prime is 1321748941. The reversal of 1321748923 is 3298471231.

It is a cyclic number.

It is not a de Polignac number, because 1321748923 - 2²¹ = 1319651771 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1321728923) 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, 544290 + ... + 546712.

It is an arithmetic number, because the mean of its divisors is an integer number (91234512).

Almost surely, 2^1321748923 is an apocalyptic number.

1321748923 is a deficient number, since it is larger than the sum of its proper divisors (138003269).

1321748923 is a wasteful number, since it uses less digits than its factorization.

1321748923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3026.

The product of its digits is 72576, while the sum is 40.

The square root of 1321748923 is about 36355.8650426585. The cubic root of 1321748923 is about 1097.4455665947.

The spelling of 1321748923 in words is "one billion, three hundred twenty-one million, seven hundred forty-eight thousand, nine hundred twenty-three".