129850949 has 2 divisors, whose sum is σ = 129850950. Its totient is φ = 129850948.

The previous prime is 129850849. The next prime is 129850961. The reversal of 129850949 is 949058921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88698724 + 41152225 = 9418^2 + 6415^2 .

It is a cyclic number.

It is not a de Polignac number, because 129850949 - 2¹⁶ = 129785413 is a prime.

It is a super-2 number, since 2×129850949² = 33722537912401202, which contains 22 as substring.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129850849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64925474 + 64925475.

It is an arithmetic number, because the mean of its divisors is an integer number (64925475).

Almost surely, 2^129850949 is an apocalyptic number.

It is an amenable number.

129850949 is a deficient number, since it is larger than the sum of its proper divisors (1).

129850949 is an equidigital number, since it uses as much as digits as its factorization.

129850949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 233280, while the sum is 47.

The square root of 129850949 is about 11395.2160576270. The cubic root of 129850949 is about 506.3860222007.

The spelling of 129850949 in words is "one hundred twenty-nine million, eight hundred fifty thousand, nine hundred forty-nine".