129889963 has 4 divisors (see below), whose sum is σ = 148445680. Its totient is φ = 111334248.

The previous prime is 129889933. The next prime is 129890011. The reversal of 129889963 is 369988921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 369988921 = 557 ⋅664253.

It is a cyclic number.

It is not a de Polignac number, because 129889963 - 2⁵ = 129889931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129889913) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9277848 + ... + 9277861.

It is an arithmetic number, because the mean of its divisors is an integer number (37111420).

Almost surely, 2^129889963 is an apocalyptic number.

129889963 is a deficient number, since it is larger than the sum of its proper divisors (18555717).

129889963 is an equidigital number, since it uses as much as digits as its factorization.

129889963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18555716.

The product of its digits is 1679616, while the sum is 55.

The square root of 129889963 is about 11396.9277877856. The cubic root of 129889963 is about 506.4367320496.

The spelling of 129889963 in words is "one hundred twenty-nine million, eight hundred eighty-nine thousand, nine hundred sixty-three".