131603737 has 2 divisors, whose sum is σ = 131603738. Its totient is φ = 131603736.

The previous prime is 131603701. The next prime is 131603753. The reversal of 131603737 is 737306131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118722816 + 12880921 = 10896^2 + 3589^2 .

It is a cyclic number.

It is not a de Polignac number, because 131603737 - 2⁷ = 131603609 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 131603699 and 131603708.

It is not a weakly prime, because it can be changed into another prime (131603767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65801868 + 65801869.

It is an arithmetic number, because the mean of its divisors is an integer number (65801869).

Almost surely, 2^131603737 is an apocalyptic number.

It is an amenable number.

131603737 is a deficient number, since it is larger than the sum of its proper divisors (1).

131603737 is an equidigital number, since it uses as much as digits as its factorization.

131603737 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7938, while the sum is 31.

The square root of 131603737 is about 11471.8671976274. The cubic root of 131603737 is about 508.6543237790.

Adding to 131603737 its reverse (737306131), we get a palindrome (868909868).

The spelling of 131603737 in words is "one hundred thirty-one million, six hundred three thousand, seven hundred thirty-seven".