97721156953 has 8 divisors (see below), whose sum is σ = 117559286720. Its totient is φ = 79352518320.

The previous prime is 97721156921. The next prime is 97721156993. The reversal of 97721156953 is 35965112779.

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 97721156953 - 2⁵ = 97721156921 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 97721156894 and 97721156903.

It is not an unprimeable number, because it can be changed into a prime (97721156993) 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, 367372638 + ... + 367372903.

It is an arithmetic number, because the mean of its divisors is an integer number (14694910840).

Almost surely, 2^97721156953 is an apocalyptic number.

It is an amenable number.

97721156953 is a deficient number, since it is larger than the sum of its proper divisors (19838129767).

97721156953 is a wasteful number, since it uses less digits than its factorization.

97721156953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 734745567.

The product of its digits is 3572100, while the sum is 55.

The spelling of 97721156953 in words is "ninety-seven billion, seven hundred twenty-one million, one hundred fifty-six thousand, nine hundred fifty-three".