1790390969 has 2 divisors, whose sum is σ = 1790390970. Its totient is φ = 1790390968.

The previous prime is 1790390831. The next prime is 1790390977. The reversal of 1790390969 is 9690930971.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1263091600 + 527299369 = 35540^2 + 22963^2 .

It is a cyclic number.

It is not a de Polignac number, because 1790390969 - 2²⁰ = 1789342393 is a prime.

It is a super-2 number, since 2×1790390969² = 6410999643753517922, 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 1790390969.

It is not a weakly prime, because it can be changed into another prime (1790390999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 895195484 + 895195485.

It is an arithmetic number, because the mean of its divisors is an integer number (895195485).

Almost surely, 2^1790390969 is an apocalyptic number.

It is an amenable number.

1790390969 is a deficient number, since it is larger than the sum of its proper divisors (1).

1790390969 is an equidigital number, since it uses as much as digits as its factorization.

1790390969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 826686, while the sum is 53.

The square root of 1790390969 is about 42313.0118166977. The cubic root of 1790390969 is about 1214.2719407678.

The spelling of 1790390969 in words is "one billion, seven hundred ninety million, three hundred ninety thousand, nine hundred sixty-nine".