131203399 has 6 divisors (see below), whose sum is σ = 139375544. Its totient is φ = 123485280.

The previous prime is 131203381. The next prime is 131203451. The reversal of 131203399 is 993302131.

It is not a de Polignac number, because 131203399 - 2¹¹ = 131201351 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131203399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131203309) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 226707 + ... + 227284.

Almost surely, 2^131203399 is an apocalyptic number.

131203399 is a deficient number, since it is larger than the sum of its proper divisors (8172145).

131203399 is an equidigital number, since it uses as much as digits as its factorization.

131203399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454025 (or 454008 counting only the distinct ones).

The product of its (nonzero) digits is 4374, while the sum is 31.

The square root of 131203399 is about 11454.4052224461. The cubic root of 131203399 is about 508.1380251459.

The spelling of 131203399 in words is "one hundred thirty-one million, two hundred three thousand, three hundred ninety-nine".