127689970 has 8 divisors (see below), whose sum is σ = 229841964. Its totient is φ = 51075984.

The previous prime is 127689967. The next prime is 127689971. The reversal of 127689970 is 79986721.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 123899161 + 3790809 = 11131^2 + 1947^2 .

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 (127689971) 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, 6384489 + ... + 6384508.

Almost surely, 2^127689970 is an apocalyptic number.

127689970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

127689970 is a deficient number, since it is larger than the sum of its proper divisors (102151994).

127689970 is a wasteful number, since it uses less digits than its factorization.

127689970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12769004.

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

The square root of 127689970 is about 11299.9986725663. The cubic root of 127689970 is about 503.5612021272.

The spelling of 127689970 in words is "one hundred twenty-seven million, six hundred eighty-nine thousand, nine hundred seventy".