131782069 has 4 divisors (see below), whose sum is σ = 132948396. Its totient is φ = 130615744.

The previous prime is 131782067. The next prime is 131782103. The reversal of 131782069 is 960287131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 960287131 = 401 ⋅2394731.

It can be written as a sum of positive squares in 2 ways, for example, as 59752900 + 72029169 = 7730^2 + 8487^2 .

It is a cyclic number.

It is not a de Polignac number, because 131782069 - 2¹ = 131782067 is a prime.

It is a super-2 number, since 2×131782069² = 34733027419841522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131782067) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 582994 + ... + 583219.

It is an arithmetic number, because the mean of its divisors is an integer number (33237099).

Almost surely, 2^131782069 is an apocalyptic number.

It is an amenable number.

131782069 is a deficient number, since it is larger than the sum of its proper divisors (1166327).

131782069 is a wasteful number, since it uses less digits than its factorization.

131782069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1166326.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 131782069 is about 11479.6371458335. The cubic root of 131782069 is about 508.8839737958.

The spelling of 131782069 in words is "one hundred thirty-one million, seven hundred eighty-two thousand, sixty-nine".