97817244021 has 24 divisors (see below), whose sum is σ = 161484832704. Its totient is φ = 55892540160.

The previous prime is 97817244013. The next prime is 97817244029. The reversal of 97817244021 is 12044271879.

97817244021 is a `hidden beast` number, since 9 + 78 + 172 + 4 + 402 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (97817244013) and next prime (97817244029).

It is not a de Polignac number, because 97817244021 - 2³ = 97817244013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97817244029) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1695370 + ... + 1752116.

It is an arithmetic number, because the mean of its divisors is an integer number (6728534696).

Almost surely, 2^97817244021 is an apocalyptic number.

It is an amenable number.

97817244021 is a deficient number, since it is larger than the sum of its proper divisors (63667588683).

97817244021 is a wasteful number, since it uses less digits than its factorization.

97817244021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84121 (or 84118 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The spelling of 97817244021 in words is "ninety-seven billion, eight hundred seventeen million, two hundred forty-four thousand, twenty-one".