1390773023 has 4 divisors (see below), whose sum is σ = 1392396720. Its totient is φ = 1389149328.

The previous prime is 1390773017. The next prime is 1390773061. The reversal of 1390773023 is 3203770931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3203770931 = 919 ⋅3486149.

It is a cyclic number.

It is not a de Polignac number, because 1390773023 - 2¹² = 1390768927 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 (1390773823) 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, 810563 + ... + 812276.

It is an arithmetic number, because the mean of its divisors is an integer number (348099180).

Almost surely, 2^1390773023 is an apocalyptic number.

1390773023 is a deficient number, since it is larger than the sum of its proper divisors (1623697).

1390773023 is an equidigital number, since it uses as much as digits as its factorization.

1390773023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1623696.

The product of its (nonzero) digits is 23814, while the sum is 35.

The square root of 1390773023 is about 37293.0693695223. The cubic root of 1390773023 is about 1116.2258760843.

The spelling of 1390773023 in words is "one billion, three hundred ninety million, seven hundred seventy-three thousand, twenty-three".