1321379433 has 32 divisors (see below), whose sum is σ = 2204467200. Its totient is φ = 774997200.

The previous prime is 1321379431. The next prime is 1321379441. The reversal of 1321379433 is 3349731231.

It is a happy number.

1321379433 is a `hidden beast` number, since 1 + 3 + 213 + 7 + 9 + 433 = 666.

It is not a de Polignac number, because 1321379433 - 2¹ = 1321379431 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1321379431) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 62553 + ... + 80966.

It is an arithmetic number, because the mean of its divisors is an integer number (68889600).

Almost surely, 2^1321379433 is an apocalyptic number.

It is an amenable number.

1321379433 is a deficient number, since it is larger than the sum of its proper divisors (883087767).

1321379433 is a wasteful number, since it uses less digits than its factorization.

1321379433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143570 (or 143564 counting only the distinct ones).

The product of its digits is 40824, while the sum is 36.

The square root of 1321379433 is about 36350.7831139853. The cubic root of 1321379433 is about 1097.3432947875.

The spelling of 1321379433 in words is "one billion, three hundred twenty-one million, three hundred seventy-nine thousand, four hundred thirty-three".