97821345 has 24 divisors (see below), whose sum is σ = 160284096. Its totient is φ = 50943648.

The previous prime is 97821343. The next prime is 97821391. The reversal of 97821345 is 54312879.

It is not a de Polignac number, because 97821345 - 2¹ = 97821343 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (97821341) 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, 25972 + ... + 29498.

It is an arithmetic number, because the mean of its divisors is an integer number (6678504).

Almost surely, 2^97821345 is an apocalyptic number.

It is an amenable number.

97821345 is a deficient number, since it is larger than the sum of its proper divisors (62462751).

97821345 is a wasteful number, since it uses less digits than its factorization.

97821345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3621 (or 3578 counting only the distinct ones).

The product of its digits is 60480, while the sum is 39.

The square root of 97821345 is about 9890.4673802607. The cubic root of 97821345 is about 460.7632963734.

The spelling of 97821345 in words is "ninety-seven million, eight hundred twenty-one thousand, three hundred forty-five".