1390262593 has 2 divisors, whose sum is σ = 1390262594. Its totient is φ = 1390262592.

The previous prime is 1390262579. The next prime is 1390262633. The reversal of 1390262593 is 3952620931.

It is an a-pointer prime, because the next prime (1390262633) can be obtained adding 1390262593 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1176284209 + 213978384 = 34297^2 + 14628^2 .

It is a cyclic number.

It is not a de Polignac number, because 1390262593 - 2⁵ = 1390262561 is a prime.

It is not a weakly prime, because it can be changed into another prime (1390262513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 695131296 + 695131297.

It is an arithmetic number, because the mean of its divisors is an integer number (695131297).

Almost surely, 2^1390262593 is an apocalyptic number.

It is an amenable number.

1390262593 is a deficient number, since it is larger than the sum of its proper divisors (1).

1390262593 is an equidigital number, since it uses as much as digits as its factorization.

1390262593 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 87480, while the sum is 40.

The square root of 1390262593 is about 37286.2252447201. The cubic root of 1390262593 is about 1116.0893033820.

The spelling of 1390262593 in words is "one billion, three hundred ninety million, two hundred sixty-two thousand, five hundred ninety-three".