131858993 has 16 divisors (see below), whose sum is σ = 162503040. Its totient is φ = 104457600.

The previous prime is 131858983. The next prime is 131859037. The reversal of 131858993 is 399858131.

It is a cyclic number.

It is not a de Polignac number, because 131858993 - 2¹⁴ = 131842609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131858933) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6638 + ... + 17543.

It is an arithmetic number, because the mean of its divisors is an integer number (10156440).

Almost surely, 2^131858993 is an apocalyptic number.

It is an amenable number.

131858993 is a deficient number, since it is larger than the sum of its proper divisors (30644047).

131858993 is a wasteful number, since it uses less digits than its factorization.

131858993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24248.

The product of its digits is 233280, while the sum is 47.

The square root of 131858993 is about 11482.9871113748. The cubic root of 131858993 is about 508.9829700070.

The spelling of 131858993 in words is "one hundred thirty-one million, eight hundred fifty-eight thousand, nine hundred ninety-three".