97781796 has 48 divisors (see below), whose sum is σ = 289726080. Its totient is φ = 27937440.

The previous prime is 97781791. The next prime is 97781833. The reversal of 97781796 is 69718779.

It is a super-2 number, since 2×97781796² = 19122559257971232, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (97781791) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63915 + ... + 65426.

It is an arithmetic number, because the mean of its divisors is an integer number (6035960).

Almost surely, 2^97781796 is an apocalyptic number.

It is an amenable number.

97781796 is an abundant number, since it is smaller than the sum of its proper divisors (191944284).

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

97781796 is a wasteful number, since it uses less digits than its factorization.

97781796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129361 (or 129353 counting only the distinct ones).

The product of its digits is 1333584, while the sum is 54.

The square root of 97781796 is about 9888.4678287387. The cubic root of 97781796 is about 460.7011927362.

The spelling of 97781796 in words is "ninety-seven million, seven hundred eighty-one thousand, seven hundred ninety-six".