131998597 has 2 divisors, whose sum is σ = 131998598. Its totient is φ = 131998596.

The previous prime is 131998583. The next prime is 131998627. The reversal of 131998597 is 795899131.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 130165281 + 1833316 = 11409^2 + 1354^2 .

It is an emirp because it is prime and its reverse (795899131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131998597 - 2¹⁹ = 131474309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131998507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65999298 + 65999299.

It is an arithmetic number, because the mean of its divisors is an integer number (65999299).

Almost surely, 2^131998597 is an apocalyptic number.

It is an amenable number.

131998597 is a deficient number, since it is larger than the sum of its proper divisors (1).

131998597 is an equidigital number, since it uses as much as digits as its factorization.

131998597 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 612360, while the sum is 52.

The square root of 131998597 is about 11489.0642351760. The cubic root of 131998597 is about 509.1625330263.

The spelling of 131998597 in words is "one hundred thirty-one million, nine hundred ninety-eight thousand, five hundred ninety-seven".