97821330 has 16 divisors (see below), whose sum is σ = 234771264. Its totient is φ = 26085680.

The previous prime is 97821319. The next prime is 97821341. The reversal of 97821330 is 3312879.

It is an interprime number because it is at equal distance from previous prime (97821319) and next prime (97821341).

It is a junction number, because it is equal to n+sod(n) for n = 97821291 and 97821300.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1630326 + ... + 1630385.

It is an arithmetic number, because the mean of its divisors is an integer number (14673204).

Almost surely, 2^97821330 is an apocalyptic number.

97821330 is an abundant number, since it is smaller than the sum of its proper divisors (136949934).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

97821330 is a wasteful number, since it uses less digits than its factorization.

97821330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3260721.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 97821330 is about 9890.4666219547. The cubic root of 97821330 is about 460.7632728221.

The spelling of 97821330 in words is "ninety-seven million, eight hundred twenty-one thousand, three hundred thirty".