131952742009 has 9 divisors (see below), whose sum is σ = 145043356549. Its totient is φ = 119953405660.

The previous prime is 131952741971. The next prime is 131952742081. The reversal of 131952742009 is 900247259131.

The square root of 131952742009 is 363253.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 131952742009 - 2¹⁹ = 131952217721 is a prime.

It is a super-2 number, since 2×131952742009² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131952742109) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3979272 + ... + 4012294.

Almost surely, 2^131952742009 is an apocalyptic number.

131952742009 is the 363253-rd square number.

131952742009 is the 181627-th centered octagonal number.

It is an amenable number.

131952742009 is a deficient number, since it is larger than the sum of its proper divisors (13090614540).

131952742009 is an frugal number, since it uses more digits than its factorization.

131952742009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66068 (or 33034 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 43.

The spelling of 131952742009 in words is "one hundred thirty-one billion, nine hundred fifty-two million, seven hundred forty-two thousand, nine".