416091581 has 2 divisors, whose sum is σ = 416091582. Its totient is φ = 416091580.

The previous prime is 416091569. The next prime is 416091631. The reversal of 416091581 is 185190614.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 240529081 + 175562500 = 15509^2 + 13250^2 .

It is a cyclic number.

It is not a de Polignac number, because 416091581 - 2¹⁴ = 416075197 is a prime.

It is a super-2 number, since 2×416091581² = 346264407558159122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (416090581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 208045790 + 208045791.

It is an arithmetic number, because the mean of its divisors is an integer number (208045791).

Almost surely, 2^416091581 is an apocalyptic number.

It is an amenable number.

416091581 is a deficient number, since it is larger than the sum of its proper divisors (1).

416091581 is an equidigital number, since it uses as much as digits as its factorization.

416091581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 35.

The square root of 416091581 is about 20398.3229947954. The cubic root of 416091581 is about 746.5570073287.

The spelling of 416091581 in words is "four hundred sixteen million, ninety-one thousand, five hundred eighty-one".