97651944 has 216 divisors, whose sum is σ = 319319910. Its totient is φ = 26790912.

The previous prime is 97651943. The next prime is 97651987. The reversal of 97651944 is 44915679.

97651944 is a `hidden beast` number, since 97 + 6 + 519 + 44 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 89529444 + 8122500 = 9462^2 + 2850^2 .

Its product of digits (272160) is a multiple of the sum of its prime divisors (54).

It is a zygodrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 97651944.

It is not an unprimeable number, because it can be changed into a prime (97651943) by changing a digit.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 5139567 + ... + 5139585.

Almost surely, 2^97651944 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 97651944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (159659955).

97651944 is an abundant number, since it is smaller than the sum of its proper divisors (221667966).

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

97651944 is a wasteful number, since it uses less digits than its factorization.

97651944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97 (or 54 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 97651944 is about 9881.8998173428. The cubic root of 97651944 is about 460.4971688297.

The spelling of 97651944 in words is "ninety-seven million, six hundred fifty-one thousand, nine hundred forty-four".