131657069 has 2 divisors, whose sum is σ = 131657070. Its totient is φ = 131657068.

The previous prime is 131657021. The next prime is 131657087. The reversal of 131657069 is 960756131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 108951844 + 22705225 = 10438^2 + 4765^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131657069 is a prime.

It is a super-2 number, since 2×131657069² = 34667167635341522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131657089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65828534 + 65828535.

It is an arithmetic number, because the mean of its divisors is an integer number (65828535).

Almost surely, 2^131657069 is an apocalyptic number.

It is an amenable number.

131657069 is a deficient number, since it is larger than the sum of its proper divisors (1).

131657069 is an equidigital number, since it uses as much as digits as its factorization.

131657069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34020, while the sum is 38.

The square root of 131657069 is about 11474.1914312077. The cubic root of 131657069 is about 508.7230246872.

It can be divided in two parts, 1316 and 57069, that added together give a palindrome (58385).

The spelling of 131657069 in words is "one hundred thirty-one million, six hundred fifty-seven thousand, sixty-nine".