97149287 has 4 divisors (see below), whose sum is σ = 97495296. Its totient is φ = 96803280.

The previous prime is 97149277. The next prime is 97149293. The reversal of 97149287 is 78294179.

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-97149287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97149277) 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, 172583 + ... + 173144.

It is an arithmetic number, because the mean of its divisors is an integer number (24373824).

Almost surely, 2^97149287 is an apocalyptic number.

97149287 is a deficient number, since it is larger than the sum of its proper divisors (346009).

97149287 is a wasteful number, since it uses less digits than its factorization.

97149287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346008.

The product of its digits is 254016, while the sum is 47.

The square root of 97149287 is about 9856.4337871261. The cubic root of 97149287 is about 459.7056828707.

The spelling of 97149287 in words is "ninety-seven million, one hundred forty-nine thousand, two hundred eighty-seven".