97146509 has 16 divisors (see below), whose sum is σ = 102954240. Its totient is φ = 91565760.

The previous prime is 97146499. The next prime is 97146521. The reversal of 97146509 is 90564179.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97146509 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97146209) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146639 + ... + 147299.

It is an arithmetic number, because the mean of its divisors is an integer number (6434640).

Almost surely, 2^97146509 is an apocalyptic number.

It is an amenable number.

97146509 is a deficient number, since it is larger than the sum of its proper divisors (5807731).

97146509 is a wasteful number, since it uses less digits than its factorization.

97146509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 820.

The product of its (nonzero) digits is 68040, while the sum is 41.

The square root of 97146509 is about 9856.2928629379. The cubic root of 97146509 is about 459.7013010422.

The spelling of 97146509 in words is "ninety-seven million, one hundred forty-six thousand, five hundred nine".