1392740933 has 4 divisors (see below), whose sum is σ = 1405066188. Its totient is φ = 1380415680.

The previous prime is 1392740927. The next prime is 1392740953. The reversal of 1392740933 is 3390472931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3390472931 = 17491 ⋅193841.

It can be written as a sum of positive squares in 2 ways, for example, as 760821889 + 631919044 = 27583^2 + 25138^2 .

It is a cyclic number.

It is not a de Polignac number, because 1392740933 - 2⁸ = 1392740677 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 (1392740903) 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, 6162458 + ... + 6162683.

It is an arithmetic number, because the mean of its divisors is an integer number (351266547).

Almost surely, 2^1392740933 is an apocalyptic number.

It is an amenable number.

1392740933 is a deficient number, since it is larger than the sum of its proper divisors (12325255).

1392740933 is a wasteful number, since it uses less digits than its factorization.

1392740933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12325254.

The product of its (nonzero) digits is 122472, while the sum is 41.

The square root of 1392740933 is about 37319.4444358434. Note that the first 4 decimals coincide. The cubic root of 1392740933 is about 1116.7521054500.

The spelling of 1392740933 in words is "one billion, three hundred ninety-two million, seven hundred forty thousand, nine hundred thirty-three".