129942737 has 2 divisors, whose sum is σ = 129942738. Its totient is φ = 129942736.

The previous prime is 129942677. The next prime is 129942763. The reversal of 129942737 is 737249921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 94789696 + 35153041 = 9736^2 + 5929^2 .

It is a cyclic number.

It is not a de Polignac number, because 129942737 - 2¹⁴ = 129926353 is a prime.

It is a super-2 number, since 2×129942737² = 33770229798102338, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (129941737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64971368 + 64971369.

It is an arithmetic number, because the mean of its divisors is an integer number (64971369).

Almost surely, 2^129942737 is an apocalyptic number.

It is an amenable number.

129942737 is a deficient number, since it is larger than the sum of its proper divisors (1).

129942737 is an equidigital number, since it uses as much as digits as its factorization.

129942737 is an evil number, because the sum of its binary digits is even.

The product of its digits is 190512, while the sum is 44.

The square root of 129942737 is about 11399.2428257319. The cubic root of 129942737 is about 506.5053107979.

The spelling of 129942737 in words is "one hundred twenty-nine million, nine hundred forty-two thousand, seven hundred thirty-seven".