102720997 has 8 divisors (see below), whose sum is σ = 103535712. Its totient is φ = 101910000.

The previous prime is 102720979. The next prime is 102721007. The reversal of 102720997 is 799027201.

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 102720997 - 2¹⁹ = 102196709 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 (102720907) 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, 78922 + ... + 80212.

It is an arithmetic number, because the mean of its divisors is an integer number (12941964).

Almost surely, 2^102720997 is an apocalyptic number.

It is an amenable number.

102720997 is a deficient number, since it is larger than the sum of its proper divisors (814715).

102720997 is a wasteful number, since it uses less digits than its factorization.

102720997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1859.

The product of its (nonzero) digits is 15876, while the sum is 37.

The square root of 102720997 is about 10135.1367529008. The cubic root of 102720997 is about 468.3311828385.

The spelling of 102720997 in words is "one hundred two million, seven hundred twenty thousand, nine hundred ninety-seven".