97681894 has 4 divisors (see below), whose sum is σ = 146522844. Its totient is φ = 48840946.

The previous prime is 97681823. The next prime is 97681951. The reversal of 97681894 is 49818679.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49818679 = 257 ⋅193847.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24420472 + ... + 24420475.

It is an arithmetic number, because the mean of its divisors is an integer number (36630711).

Almost surely, 2^97681894 is an apocalyptic number.

97681894 is a deficient number, since it is larger than the sum of its proper divisors (48840950).

97681894 is a wasteful number, since it uses less digits than its factorization.

97681894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48840949.

The product of its digits is 870912, while the sum is 52.

The square root of 97681894 is about 9883.4150980317. The cubic root of 97681894 is about 460.5442424119.

The spelling of 97681894 in words is "ninety-seven million, six hundred eighty-one thousand, eight hundred ninety-four".