129838493 has 2 divisors, whose sum is σ = 129838494. Its totient is φ = 129838492.

The previous prime is 129838459. The next prime is 129838523. The reversal of 129838493 is 394838921.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 129663769 + 174724 = 11387^2 + 418^2 .

It is a cyclic number.

It is not a de Polignac number, because 129838493 - 2¹⁴ = 129822109 is a prime.

It is a super-2 number, since 2×129838493² = 33716068529022098, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129838433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64919246 + 64919247.

It is an arithmetic number, because the mean of its divisors is an integer number (64919247).

Almost surely, 2^129838493 is an apocalyptic number.

It is an amenable number.

129838493 is a deficient number, since it is larger than the sum of its proper divisors (1).

129838493 is an equidigital number, since it uses as much as digits as its factorization.

129838493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 373248, while the sum is 47.

The square root of 129838493 is about 11394.6694993756. The cubic root of 129838493 is about 506.3698299278.

The spelling of 129838493 in words is "one hundred twenty-nine million, eight hundred thirty-eight thousand, four hundred ninety-three".