102738921 has 8 divisors (see below), whose sum is σ = 137284224. Its totient is φ = 68343120.

The previous prime is 102738919. The next prime is 102738949. The reversal of 102738921 is 129837201.

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

It is not a de Polignac number, because 102738921 - 2¹ = 102738919 is a prime.

It is not an unprimeable number, because it can be changed into a prime (102738121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35761 + ... + 38526.

It is an arithmetic number, because the mean of its divisors is an integer number (17160528).

Almost surely, 2^102738921 is an apocalyptic number.

It is an amenable number.

102738921 is a deficient number, since it is larger than the sum of its proper divisors (34545303).

102738921 is an equidigital number, since it uses as much as digits as its factorization.

102738921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74751.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 102738921 is about 10136.0209648560. The cubic root of 102738921 is about 468.3584212810.

The spelling of 102738921 in words is "one hundred two million, seven hundred thirty-eight thousand, nine hundred twenty-one".