97123890 has 64 divisors (see below), whose sum is σ = 253528704. Its totient is φ = 23712768.

The previous prime is 97123889. The next prime is 97123891. The reversal of 97123890 is 9832179.

It is an interprime number because it is at equal distance from previous prime (97123889) and next prime (97123891).

It is not an unprimeable number, because it can be changed into a prime (97123891) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16297 + ... + 21443.

It is an arithmetic number, because the mean of its divisors is an integer number (3961386).

Almost surely, 2^97123890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 97123890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126764352).

97123890 is an abundant number, since it is smaller than the sum of its proper divisors (156404814).

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

97123890 is a wasteful number, since it uses less digits than its factorization.

97123890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5211.

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 97123890 is about 9855.1453566145. The cubic root of 97123890 is about 459.6656202581.

The spelling of 97123890 in words is "ninety-seven million, one hundred twenty-three thousand, eight hundred ninety".