97404187 has 4 divisors (see below), whose sum is σ = 97538896. Its totient is φ = 97269480.

The previous prime is 97404161. The next prime is 97404191. The reversal of 97404187 is 78140479.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78140479 = 433 ⋅180463.

It is a cyclic number.

It is not a de Polignac number, because 97404187 - 2⁷ = 97404059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97404107) 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, 66264 + ... + 67717.

It is an arithmetic number, because the mean of its divisors is an integer number (24384724).

Almost surely, 2^97404187 is an apocalyptic number.

97404187 is a deficient number, since it is larger than the sum of its proper divisors (134709).

97404187 is a wasteful number, since it uses less digits than its factorization.

97404187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134708.

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 97404187 is about 9869.3559566975. The cubic root of 97404187 is about 460.1073898611.

The spelling of 97404187 in words is "ninety-seven million, four hundred four thousand, one hundred eighty-seven".