1790377997 has 2 divisors, whose sum is σ = 1790377998. Its totient is φ = 1790377996.

The previous prime is 1790377987. The next prime is 1790378021. The reversal of 1790377997 is 7997730971.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1066283716 + 724094281 = 32654^2 + 26909^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1790377997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1790377987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 895188998 + 895188999.

It is an arithmetic number, because the mean of its divisors is an integer number (895188999).

Almost surely, 2^1790377997 is an apocalyptic number.

It is an amenable number.

1790377997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1790377997 is an equidigital number, since it uses as much as digits as its factorization.

1790377997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5250987, while the sum is 59.

The square root of 1790377997 is about 42312.8585302388. The cubic root of 1790377997 is about 1214.2690081544.

The spelling of 1790377997 in words is "one billion, seven hundred ninety million, three hundred seventy-seven thousand, nine hundred ninety-seven".