131288873 has 2 divisors, whose sum is σ = 131288874. Its totient is φ = 131288872.

The previous prime is 131288863. The next prime is 131288903. The reversal of 131288873 is 378882131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 128754409 + 2534464 = 11347^2 + 1592^2 .

It is a cyclic number.

It is not a de Polignac number, because 131288873 - 2¹⁴ = 131272489 is a prime.

It is a super-3 number, since 3×131288873³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 131288873.

It is not a weakly prime, because it can be changed into another prime (131288863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65644436 + 65644437.

It is an arithmetic number, because the mean of its divisors is an integer number (65644437).

Almost surely, 2^131288873 is an apocalyptic number.

It is an amenable number.

131288873 is a deficient number, since it is larger than the sum of its proper divisors (1).

131288873 is an equidigital number, since it uses as much as digits as its factorization.

131288873 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64512, while the sum is 41.

The square root of 131288873 is about 11458.1356685981. The cubic root of 131288873 is about 508.2483453605.

The spelling of 131288873 in words is "one hundred thirty-one million, two hundred eighty-eight thousand, eight hundred seventy-three".