131554009 has 2 divisors, whose sum is σ = 131554010. Its totient is φ = 131554008.

The previous prime is 131553977. The next prime is 131554021. The reversal of 131554009 is 900455131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83667609 + 47886400 = 9147^2 + 6920^2 .

It is a cyclic number.

It is not a de Polignac number, because 131554009 - 2⁵ = 131553977 is a prime.

It is not a weakly prime, because it can be changed into another prime (131554079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65777004 + 65777005.

It is an arithmetic number, because the mean of its divisors is an integer number (65777005).

Almost surely, 2^131554009 is an apocalyptic number.

It is an amenable number.

131554009 is a deficient number, since it is larger than the sum of its proper divisors (1).

131554009 is an equidigital number, since it uses as much as digits as its factorization.

131554009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 131554009 is about 11469.6996037385. The cubic root of 131554009 is about 508.5902487272.

The spelling of 131554009 in words is "one hundred thirty-one million, five hundred fifty-four thousand, nine".