164987297 has 4 divisors (see below), whose sum is σ = 165054720. Its totient is φ = 164919876.

The previous prime is 164987267. The next prime is 164987311. The reversal of 164987297 is 792789461.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 792789461 = 23 ⋅34469107.

It is a cyclic number.

It is not a de Polignac number, because 164987297 - 2⁶ = 164987233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164987267) 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, 29897 + ... + 34982.

It is an arithmetic number, because the mean of its divisors is an integer number (41263680).

Almost surely, 2^164987297 is an apocalyptic number.

It is an amenable number.

164987297 is a deficient number, since it is larger than the sum of its proper divisors (67423).

164987297 is an equidigital number, since it uses as much as digits as its factorization.

164987297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67422.

The product of its digits is 1524096, while the sum is 53.

The square root of 164987297 is about 12844.7381055435. The cubic root of 164987297 is about 548.4665794280.

The spelling of 164987297 in words is "one hundred sixty-four million, nine hundred eighty-seven thousand, two hundred ninety-seven".