102891655 has 4 divisors (see below), whose sum is σ = 123469992. Its totient is φ = 82313320.

The previous prime is 102891653. The next prime is 102891661. The reversal of 102891655 is 556198201.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 102891655 - 2¹ = 102891653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102891653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10289161 + ... + 10289170.

It is an arithmetic number, because the mean of its divisors is an integer number (30867498).

Almost surely, 2^102891655 is an apocalyptic number.

102891655 is a deficient number, since it is larger than the sum of its proper divisors (20578337).

102891655 is an equidigital number, since it uses as much as digits as its factorization.

102891655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20578336.

The product of its (nonzero) digits is 21600, while the sum is 37.

The square root of 102891655 is about 10143.5523856290. The cubic root of 102891655 is about 468.5903971006.

The spelling of 102891655 in words is "one hundred two million, eight hundred ninety-one thousand, six hundred fifty-five".