131359621 has 2 divisors, whose sum is σ = 131359622. Its totient is φ = 131359620.

The previous prime is 131359619. The next prime is 131359633. The reversal of 131359621 is 126953131.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 104837121 + 26522500 = 10239^2 + 5150^2 .

It is a cyclic number.

It is not a de Polignac number, because 131359621 - 2¹ = 131359619 is a prime.

Together with 131359619, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131359651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65679810 + 65679811.

It is an arithmetic number, because the mean of its divisors is an integer number (65679811).

Almost surely, 2^131359621 is an apocalyptic number.

It is an amenable number.

131359621 is a deficient number, since it is larger than the sum of its proper divisors (1).

131359621 is an equidigital number, since it uses as much as digits as its factorization.

131359621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4860, while the sum is 31.

The square root of 131359621 is about 11461.2224915146. Note that the first 3 decimals coincide. The cubic root of 131359621 is about 508.3396226998.

The spelling of 131359621 in words is "one hundred thirty-one million, three hundred fifty-nine thousand, six hundred twenty-one".