131980249 has 2 divisors, whose sum is σ = 131980250. Its totient is φ = 131980248.

The previous prime is 131980217. The next prime is 131980337. The reversal of 131980249 is 942089131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 114340249 + 17640000 = 10693^2 + 4200^2 .

It is a cyclic number.

It is not a de Polignac number, because 131980249 - 2⁵ = 131980217 is a prime.

It is a super-2 number, since 2×131980249² = 34837572252204002, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (131980649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65990124 + 65990125.

It is an arithmetic number, because the mean of its divisors is an integer number (65990125).

Almost surely, 2^131980249 is an apocalyptic number.

It is an amenable number.

131980249 is a deficient number, since it is larger than the sum of its proper divisors (1).

131980249 is an equidigital number, since it uses as much as digits as its factorization.

131980249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 131980249 is about 11488.2657089745. The cubic root of 131980249 is about 509.1389404850.

The spelling of 131980249 in words is "one hundred thirty-one million, nine hundred eighty thousand, two hundred forty-nine".