97146891 has 32 divisors (see below), whose sum is σ = 153817920. Its totient is φ = 60383232.

The previous prime is 97146821. The next prime is 97146893. The reversal of 97146891 is 19864179.

It is a happy number.

It is not a de Polignac number, because 97146891 - 2¹¹ = 97144843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (97146893) 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, 50931 + ... + 52803.

It is an arithmetic number, because the mean of its divisors is an integer number (4806810).

Almost surely, 2^97146891 is an apocalyptic number.

97146891 is a deficient number, since it is larger than the sum of its proper divisors (56671029).

97146891 is a wasteful number, since it uses less digits than its factorization.

97146891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2012 (or 2006 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 97146891 is about 9856.3122414014. The cubic root of 97146891 is about 459.7019035880.

The spelling of 97146891 in words is "ninety-seven million, one hundred forty-six thousand, eight hundred ninety-one".