102791591 has 4 divisors (see below), whose sum is σ = 117476112. Its totient is φ = 88107072.

The previous prime is 102791569. The next prime is 102791593. The reversal of 102791591 is 195197201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 195197201 = 4691 ⋅41611.

It is a cyclic number.

It is not a de Polignac number, because 102791591 - 2¹⁸ = 102529447 is a prime.

It is a super-2 number, since 2×102791591² = 21132222360622562, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102791593) 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 in 3 ways as a sum of consecutive naturals, for example, 7342250 + ... + 7342263.

It is an arithmetic number, because the mean of its divisors is an integer number (29369028).

Almost surely, 2^102791591 is an apocalyptic number.

102791591 is a deficient number, since it is larger than the sum of its proper divisors (14684521).

102791591 is an equidigital number, since it uses as much as digits as its factorization.

102791591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14684520.

The product of its (nonzero) digits is 5670, while the sum is 35.

The square root of 102791591 is about 10138.6187915317. The cubic root of 102791591 is about 468.4384436118.

The spelling of 102791591 in words is "one hundred two million, seven hundred ninety-one thousand, five hundred ninety-one".