1290166831 has 2 divisors, whose sum is σ = 1290166832. Its totient is φ = 1290166830.

The previous prime is 1290166789. The next prime is 1290166841. The reversal of 1290166831 is 1386610921.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1290166831 - 2²⁹ = 753295919 is a prime.

It is a super-2 number, since 2×1290166831² = 3329060903625165122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1290166841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 645083415 + 645083416.

It is an arithmetic number, because the mean of its divisors is an integer number (645083416).

Almost surely, 2^1290166831 is an apocalyptic number.

1290166831 is a deficient number, since it is larger than the sum of its proper divisors (1).

1290166831 is an equidigital number, since it uses as much as digits as its factorization.

1290166831 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 1290166831 is about 35918.8923966205. The cubic root of 1290166831 is about 1088.6341591037.

The spelling of 1290166831 in words is "one billion, two hundred ninety million, one hundred sixty-six thousand, eight hundred thirty-one".