1392487231 has 2 divisors, whose sum is σ = 1392487232. Its totient is φ = 1392487230.

The previous prime is 1392487157. The next prime is 1392487237. The reversal of 1392487231 is 1327842931.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1392487231 - 2¹¹ = 1392485183 is a prime.

It is a super-2 number, since 2×1392487231² = 3878041376996094722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1392487237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 696243615 + 696243616.

It is an arithmetic number, because the mean of its divisors is an integer number (696243616).

Almost surely, 2^1392487231 is an apocalyptic number.

1392487231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1392487231 is an equidigital number, since it uses as much as digits as its factorization.

1392487231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 40.

The square root of 1392487231 is about 37316.0452218613. The cubic root of 1392487231 is about 1116.6842920611.

The spelling of 1392487231 in words is "one billion, three hundred ninety-two million, four hundred eighty-seven thousand, two hundred thirty-one".