97693290 has 72 divisors (see below), whose sum is σ = 263935620. Its totient is φ = 26034048.

The previous prime is 97693289. The next prime is 97693301. The reversal of 97693290 is 9239679.

It can be written as a sum of positive squares in 2 ways, for example, as 92910321 + 4782969 = 9639^2 + 2187^2 .

It is a super-2 number, since 2×97693290² = 19087957822048200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 64866 + ... + 66354.

Almost surely, 2^97693290 is an apocalyptic number.

97693290 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 97693290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131967810).

97693290 is an abundant number, since it is smaller than the sum of its proper divisors (166242330).

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

97693290 is an equidigital number, since it uses as much as digits as its factorization.

97693290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1520 (or 1499 counting only the distinct ones).

The product of its (nonzero) digits is 183708, while the sum is 45.

The square root of 97693290 is about 9883.9916025865. The cubic root of 97693290 is about 460.5621514221.

The spelling of 97693290 in words is "ninety-seven million, six hundred ninety-three thousand, two hundred ninety".