131625397 has 2 divisors, whose sum is σ = 131625398. Its totient is φ = 131625396.

The previous prime is 131625313. The next prime is 131625419. The reversal of 131625397 is 793526131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65918161 + 65707236 = 8119^2 + 8106^2 .

It is an emirp because it is prime and its reverse (793526131) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131625397 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131622397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65812698 + 65812699.

It is an arithmetic number, because the mean of its divisors is an integer number (65812699).

Almost surely, 2^131625397 is an apocalyptic number.

It is an amenable number.

131625397 is a deficient number, since it is larger than the sum of its proper divisors (1).

131625397 is an equidigital number, since it uses as much as digits as its factorization.

131625397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34020, while the sum is 37.

The square root of 131625397 is about 11472.8112073720. The cubic root of 131625397 is about 508.6822278708.

The spelling of 131625397 in words is "one hundred thirty-one million, six hundred twenty-five thousand, three hundred ninety-seven".