102371991 has 8 divisors (see below), whose sum is σ = 139071600. Its totient is φ = 66960192.

The previous prime is 102371959. The next prime is 102371993. The reversal of 102371991 is 199173201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 102371991 - 2⁵ = 102371959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102371993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 321766 + ... + 322083.

It is an arithmetic number, because the mean of its divisors is an integer number (17383950).

Almost surely, 2^102371991 is an apocalyptic number.

102371991 is a deficient number, since it is larger than the sum of its proper divisors (36699609).

102371991 is an equidigital number, since it uses as much as digits as its factorization.

102371991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643905.

The product of its (nonzero) digits is 3402, while the sum is 33.

The square root of 102371991 is about 10117.9044767185. The cubic root of 102371991 is about 467.8001785927.

The spelling of 102371991 in words is "one hundred two million, three hundred seventy-one thousand, nine hundred ninety-one".