1398795973 has 2 divisors, whose sum is σ = 1398795974. Its totient is φ = 1398795972.

The previous prime is 1398795961. The next prime is 1398796031. The reversal of 1398795973 is 3795978931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 898021089 + 500774884 = 29967^2 + 22378^2 .

It is an emirp because it is prime and its reverse (3795978931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1398795973 - 2²⁵ = 1365241541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1398795943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 699397986 + 699397987.

It is an arithmetic number, because the mean of its divisors is an integer number (699397987).

Almost surely, 2^1398795973 is an apocalyptic number.

It is an amenable number.

1398795973 is a deficient number, since it is larger than the sum of its proper divisors (1).

1398795973 is an equidigital number, since it uses as much as digits as its factorization.

1398795973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12859560, while the sum is 61.

The square root of 1398795973 is about 37400.4809193679. The cubic root of 1398795973 is about 1118.3681520803.

The spelling of 1398795973 in words is "one billion, three hundred ninety-eight million, seven hundred ninety-five thousand, nine hundred seventy-three".