129940970 has 8 divisors (see below), whose sum is σ = 233893764. Its totient is φ = 51976384.

The previous prime is 129940913. The next prime is 129940973. The reversal of 129940970 is 79049921.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 120275089 + 9665881 = 10967^2 + 3109^2 .

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 (129940973) 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, 6497039 + ... + 6497058.

Almost surely, 2^129940970 is an apocalyptic number.

129940970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129940970 is a deficient number, since it is larger than the sum of its proper divisors (103952794).

129940970 is a wasteful number, since it uses less digits than its factorization.

129940970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12994104.

The product of its (nonzero) digits is 40824, while the sum is 41.

The square root of 129940970 is about 11399.1653203206. The cubic root of 129940970 is about 506.5030149175.

The spelling of 129940970 in words is "one hundred twenty-nine million, nine hundred forty thousand, nine hundred seventy".