187464318997 has 2 divisors, whose sum is σ = 187464318998. Its totient is φ = 187464318996.

The previous prime is 187464318973. The next prime is 187464319117. The reversal of 187464318997 is 799813464781.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94098016516 + 93366302481 = 306754^2 + 305559^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-187464318997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (187464318907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 93732159498 + 93732159499.

It is an arithmetic number, because the mean of its divisors is an integer number (93732159499).

Almost surely, 2^187464318997 is an apocalyptic number.

It is an amenable number.

187464318997 is a deficient number, since it is larger than the sum of its proper divisors (1).

187464318997 is an equidigital number, since it uses as much as digits as its factorization.

187464318997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 73156608, while the sum is 67.

The spelling of 187464318997 in words is "one hundred eighty-seven billion, four hundred sixty-four million, three hundred eighteen thousand, nine hundred ninety-seven".