186997313 has 4 divisors (see below), whose sum is σ = 187050288. Its totient is φ = 186944340.

The previous prime is 186997271. The next prime is 186997339. The reversal of 186997313 is 313799681.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 186997313 - 2¹⁴ = 186980929 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (186927313) 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, 20783 + ... + 28388.

It is an arithmetic number, because the mean of its divisors is an integer number (46762572).

Almost surely, 2^186997313 is an apocalyptic number.

It is an amenable number.

186997313 is a deficient number, since it is larger than the sum of its proper divisors (52975).

186997313 is an equidigital number, since it uses as much as digits as its factorization.

186997313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52974.

The product of its digits is 244944, while the sum is 47.

The square root of 186997313 is about 13674.6960843742. The cubic root of 186997313 is about 571.8451675162.

The spelling of 186997313 in words is "one hundred eighty-six million, nine hundred ninety-seven thousand, three hundred thirteen".