1791532081 has 2 divisors, whose sum is σ = 1791532082. Its totient is φ = 1791532080.

The previous prime is 1791532069. The next prime is 1791532111. The reversal of 1791532081 is 1802351971.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1616763681 + 174768400 = 40209^2 + 13220^2 .

It is a cyclic number.

It is not a de Polignac number, because 1791532081 - 2⁷ = 1791531953 is a prime.

It is a super-2 number, since 2×1791532081² = 6419174394504381122, 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 1791532081.

It is not a weakly prime, because it can be changed into another prime (1791532481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 895766040 + 895766041.

It is an arithmetic number, because the mean of its divisors is an integer number (895766041).

Almost surely, 2^1791532081 is an apocalyptic number.

It is an amenable number.

1791532081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1791532081 is an equidigital number, since it uses as much as digits as its factorization.

1791532081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 37.

The square root of 1791532081 is about 42326.4938425096. The cubic root of 1791532081 is about 1214.5298594821.

The spelling of 1791532081 in words is "one billion, seven hundred ninety-one million, five hundred thirty-two thousand, eighty-one".