102872991 has 8 divisors (see below), whose sum is σ = 147715120. Its totient is φ = 63306432.

The previous prime is 102872971. The next prime is 102872993. The reversal of 102872991 is 199278201.

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

It is not a de Polignac number, because 102872991 - 2¹³ = 102864799 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 2637769 = 102872991 / (1 + 0 + 2 + 8 + 7 + 2 + 9 + 9 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102872993) 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, 1318846 + ... + 1318923.

It is an arithmetic number, because the mean of its divisors is an integer number (18464390).

Almost surely, 2^102872991 is an apocalyptic number.

102872991 is a deficient number, since it is larger than the sum of its proper divisors (44842129).

102872991 is a wasteful number, since it uses less digits than its factorization.

102872991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2637785.

The product of its (nonzero) digits is 18144, while the sum is 39.

The square root of 102872991 is about 10142.6323506277. The cubic root of 102872991 is about 468.5620621171.

The spelling of 102872991 in words is "one hundred two million, eight hundred seventy-two thousand, nine hundred ninety-one".