127991330 has 8 divisors (see below), whose sum is σ = 230384412. Its totient is φ = 51196528.

The previous prime is 127991321. The next prime is 127991333. The reversal of 127991330 is 33199721.

It can be written as a sum of positive squares in 2 ways, for example, as 124925329 + 3066001 = 11177^2 + 1751^2 .

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 (127991333) 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, 6399557 + ... + 6399576.

Almost surely, 2^127991330 is an apocalyptic number.

127991330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

127991330 is a deficient number, since it is larger than the sum of its proper divisors (102393082).

127991330 is a wasteful number, since it uses less digits than its factorization.

127991330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12799140.

The product of its (nonzero) digits is 10206, while the sum is 35.

The square root of 127991330 is about 11313.3253290092. The cubic root of 127991330 is about 503.9570410390.

The spelling of 127991330 in words is "one hundred twenty-seven million, nine hundred ninety-one thousand, three hundred thirty".