100622591 has 2 divisors, whose sum is σ = 100622592. Its totient is φ = 100622590.

The previous prime is 100622579. The next prime is 100622597. The reversal of 100622591 is 195226001.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100622591 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 100622591.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100622597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50311295 + 50311296.

It is an arithmetic number, because the mean of its divisors is an integer number (50311296).

Almost surely, 2^100622591 is an apocalyptic number.

100622591 is a deficient number, since it is larger than the sum of its proper divisors (1).

100622591 is an equidigital number, since it uses as much as digits as its factorization.

100622591 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 100622591 is about 10031.0812478018. The cubic root of 100622591 is about 465.1201616466.

Adding to 100622591 its reverse (195226001), we get a palindrome (295848592).

The spelling of 100622591 in words is "one hundred million, six hundred twenty-two thousand, five hundred ninety-one".