97148891 has 4 divisors (see below), whose sum is σ = 111027312. Its totient is φ = 83270472.

The previous prime is 97148873. The next prime is 97148951. The reversal of 97148891 is 19884179.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97148891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97148851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6939200 + ... + 6939213.

It is an arithmetic number, because the mean of its divisors is an integer number (27756828).

Almost surely, 2^97148891 is an apocalyptic number.

97148891 is a deficient number, since it is larger than the sum of its proper divisors (13878421).

97148891 is a wasteful number, since it uses less digits than its factorization.

97148891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13878420.

The product of its digits is 145152, while the sum is 47.

The square root of 97148891 is about 9856.4136987040. The cubic root of 97148891 is about 459.7050582523.

The spelling of 97148891 in words is "ninety-seven million, one hundred forty-eight thousand, eight hundred ninety-one".