102916721 has 8 divisors (see below), whose sum is σ = 106258944. Its totient is φ = 99604080.

The previous prime is 102916717. The next prime is 102916747. The reversal of 102916721 is 127619201.

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

It is a cyclic number.

It is not a de Polignac number, because 102916721 - 2² = 102916717 is a prime.

It is a super-2 number, since 2×102916721² = 21183702922783682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102916771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 215 + ... + 14348.

It is an arithmetic number, because the mean of its divisors is an integer number (13282368).

Almost surely, 2^102916721 is an apocalyptic number.

It is an amenable number.

102916721 is a deficient number, since it is larger than the sum of its proper divisors (3342223).

102916721 is a wasteful number, since it uses less digits than its factorization.

102916721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14791.

The product of its (nonzero) digits is 1512, while the sum is 29.

The square root of 102916721 is about 10144.7878735832. The cubic root of 102916721 is about 468.6284459693.

The spelling of 102916721 in words is "one hundred two million, nine hundred sixteen thousand, seven hundred twenty-one".