1392549161 has 2 divisors, whose sum is σ = 1392549162. Its totient is φ = 1392549160.

The previous prime is 1392549157. The next prime is 1392549293. The reversal of 1392549161 is 1619452931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1273062400 + 119486761 = 35680^2 + 10931^2 .

It is a cyclic number.

It is not a de Polignac number, because 1392549161 - 2² = 1392549157 is a prime.

It is not a weakly prime, because it can be changed into another prime (1392549061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 696274580 + 696274581.

It is an arithmetic number, because the mean of its divisors is an integer number (696274581).

Almost surely, 2^1392549161 is an apocalyptic number.

It is an amenable number.

1392549161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1392549161 is an equidigital number, since it uses as much as digits as its factorization.

1392549161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58320, while the sum is 41.

The square root of 1392549161 is about 37316.8750165391. The cubic root of 1392549161 is about 1116.7008464279.

The spelling of 1392549161 in words is "one billion, three hundred ninety-two million, five hundred forty-nine thousand, one hundred sixty-one".