129850849 has 2 divisors, whose sum is σ = 129850850. Its totient is φ = 129850848.

The previous prime is 129850843. The next prime is 129850949. The reversal of 129850849 is 948058921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71098624 + 58752225 = 8432^2 + 7665^2 .

It is a cyclic number.

It is not a de Polignac number, because 129850849 - 2⁵ = 129850817 is a prime.

It is a super-2 number, since 2×129850849² = 33722485972041602, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 129850799 and 129850808.

It is not a weakly prime, because it can be changed into another prime (129850843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64925424 + 64925425.

It is an arithmetic number, because the mean of its divisors is an integer number (64925425).

Almost surely, 2^129850849 is an apocalyptic number.

It is an amenable number.

129850849 is a deficient number, since it is larger than the sum of its proper divisors (1).

129850849 is an equidigital number, since it uses as much as digits as its factorization.

129850849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 207360, while the sum is 46.

The square root of 129850849 is about 11395.2116698199. The cubic root of 129850849 is about 506.3858922091.

The spelling of 129850849 in words is "one hundred twenty-nine million, eight hundred fifty thousand, eight hundred forty-nine".