129077530 has 8 divisors (see below), whose sum is σ = 232339572. Its totient is φ = 51631008.

The previous prime is 129077519. The next prime is 129077539. The reversal of 129077530 is 35770921.

It can be written as a sum of positive squares in 2 ways, for example, as 128799801 + 277729 = 11349^2 + 527^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×129077530² = 33322017501801800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (129077539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6453867 + ... + 6453886.

Almost surely, 2^129077530 is an apocalyptic number.

129077530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129077530 is a deficient number, since it is larger than the sum of its proper divisors (103262042).

129077530 is a wasteful number, since it uses less digits than its factorization.

129077530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12907760.

The product of its (nonzero) digits is 13230, while the sum is 34.

The square root of 129077530 is about 11361.2292468729. The cubic root of 129077530 is about 505.3786396670.

The spelling of 129077530 in words is "one hundred twenty-nine million, seventy-seven thousand, five hundred thirty".