1393072561 has 2 divisors, whose sum is σ = 1393072562. Its totient is φ = 1393072560.

The previous prime is 1393072553. The next prime is 1393072573. The reversal of 1393072561 is 1652703931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1199306161 + 193766400 = 34631^2 + 13920^2 .

It is a cyclic number.

It is not a de Polignac number, because 1393072561 - 2³ = 1393072553 is a prime.

It is a super-2 number, since 2×1393072561² = 3881302320422197442, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1393072561.

It is not a weakly prime, because it can be changed into another prime (1393072501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 696536280 + 696536281.

It is an arithmetic number, because the mean of its divisors is an integer number (696536281).

Almost surely, 2^1393072561 is an apocalyptic number.

It is an amenable number.

1393072561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1393072561 is an equidigital number, since it uses as much as digits as its factorization.

1393072561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34020, while the sum is 37.

The square root of 1393072561 is about 37323.8872707546. The cubic root of 1393072561 is about 1116.8407356869.

The spelling of 1393072561 in words is "one billion, three hundred ninety-three million, seventy-two thousand, five hundred sixty-one".