129687470 has 16 divisors (see below), whose sum is σ = 254659248. Its totient is φ = 47159040.

The previous prime is 129687463. The next prime is 129687473. The reversal of 129687470 is 74786921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129687473) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 589379 + ... + 589598.

It is an arithmetic number, because the mean of its divisors is an integer number (15916203).

Almost surely, 2^129687470 is an apocalyptic number.

129687470 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129687470 is a deficient number, since it is larger than the sum of its proper divisors (124971778).

129687470 is a wasteful number, since it uses less digits than its factorization.

129687470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1178995.

The product of its (nonzero) digits is 169344, while the sum is 44.

The square root of 129687470 is about 11388.0406567592. The cubic root of 129687470 is about 506.1734239711.

The spelling of 129687470 in words is "one hundred twenty-nine million, six hundred eighty-seven thousand, four hundred seventy".