129870970 has 8 divisors (see below), whose sum is σ = 233767764. Its totient is φ = 51948384.

The previous prime is 129870967. The next prime is 129870971. The reversal of 129870970 is 79078921.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 124077321 + 5793649 = 11139^2 + 2407^2 .

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

It is not an unprimeable number, because it can be changed into a prime (129870971) 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, 6493539 + ... + 6493558.

Almost surely, 2^129870970 is an apocalyptic number.

129870970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129870970 is a deficient number, since it is larger than the sum of its proper divisors (103896794).

129870970 is a wasteful number, since it uses less digits than its factorization.

129870970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12987104.

The product of its (nonzero) digits is 63504, while the sum is 43.

The square root of 129870970 is about 11396.0945064526. The cubic root of 129870970 is about 506.4120464837.

The spelling of 129870970 in words is "one hundred twenty-nine million, eight hundred seventy thousand, nine hundred seventy".