102921879 has 16 divisors (see below), whose sum is σ = 144759680. Its totient is φ = 64864800.

The previous prime is 102921877. The next prime is 102921881. The reversal of 102921879 is 978129201.

It is an interprime number because it is at equal distance from previous prime (102921877) and next prime (102921881).

It is not a de Polignac number, because 102921879 - 2¹ = 102921877 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 (102921877) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29529 + ... + 32829.

It is an arithmetic number, because the mean of its divisors is an integer number (9047480).

Almost surely, 2^102921879 is an apocalyptic number.

102921879 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

102921879 is a deficient number, since it is larger than the sum of its proper divisors (41837801).

102921879 is a wasteful number, since it uses less digits than its factorization.

102921879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3870.

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

The square root of 102921879 is about 10145.0420896120. The cubic root of 102921879 is about 468.6362747754.

The spelling of 102921879 in words is "one hundred two million, nine hundred twenty-one thousand, eight hundred seventy-nine".