129687970 has 8 divisors (see below), whose sum is σ = 233438364. Its totient is φ = 51875184.

The previous prime is 129687919. The next prime is 129687983. The reversal of 129687970 is 79786921.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 108555561 + 21132409 = 10419^2 + 4597^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6484389 + ... + 6484408.

Almost surely, 2^129687970 is an apocalyptic number.

129687970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129687970 is a deficient number, since it is larger than the sum of its proper divisors (103750394).

129687970 is a wasteful number, since it uses less digits than its factorization.

129687970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12968804.

The product of its (nonzero) digits is 381024, while the sum is 49.

The square root of 129687970 is about 11388.0626095926. The cubic root of 129687970 is about 506.1740744744.

The spelling of 129687970 in words is "one hundred twenty-nine million, six hundred eighty-seven thousand, nine hundred seventy".