100612591 has 2 divisors, whose sum is σ = 100612592. Its totient is φ = 100612590.

The previous prime is 100612553. The next prime is 100612621. The reversal of 100612591 is 195216001.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 100612591 - 2⁹ = 100612079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100612691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50306295 + 50306296.

It is an arithmetic number, because the mean of its divisors is an integer number (50306296).

Almost surely, 2^100612591 is an apocalyptic number.

100612591 is a deficient number, since it is larger than the sum of its proper divisors (1).

100612591 is an equidigital number, since it uses as much as digits as its factorization.

100612591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540, while the sum is 25.

The square root of 100612591 is about 10030.5827846641. The cubic root of 100612591 is about 465.1047530601.

Adding to 100612591 its reverse (195216001), we get a palindrome (295828592).

The spelling of 100612591 in words is "one hundred million, six hundred twelve thousand, five hundred ninety-one".