1290788951 has 2 divisors, whose sum is σ = 1290788952. Its totient is φ = 1290788950.

The previous prime is 1290788923. The next prime is 1290788987. The reversal of 1290788951 is 1598870921.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1290788951 is a prime.

It is a super-2 number, since 2×1290788951² = 3332272232047360802, 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 1290788951.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1290788651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 645394475 + 645394476.

It is an arithmetic number, because the mean of its divisors is an integer number (645394476).

Almost surely, 2^1290788951 is an apocalyptic number.

1290788951 is a deficient number, since it is larger than the sum of its proper divisors (1).

1290788951 is an equidigital number, since it uses as much as digits as its factorization.

1290788951 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 362880, while the sum is 50.

The square root of 1290788951 is about 35927.5514194886. The cubic root of 1290788951 is about 1088.8091112203.

The spelling of 1290788951 in words is "one billion, two hundred ninety million, seven hundred eighty-eight thousand, nine hundred fifty-one".