127792661 has 4 divisors (see below), whose sum is σ = 127825824. Its totient is φ = 127759500.

The previous prime is 127792657. The next prime is 127792663. The reversal of 127792661 is 166297721.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 127792661 - 2² = 127792657 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127792663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9905 + ... + 18806.

It is an arithmetic number, because the mean of its divisors is an integer number (31956456).

Almost surely, 2^127792661 is an apocalyptic number.

It is an amenable number.

127792661 is a deficient number, since it is larger than the sum of its proper divisors (33163).

127792661 is an equidigital number, since it uses as much as digits as its factorization.

127792661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33162.

The product of its digits is 63504, while the sum is 41.

The square root of 127792661 is about 11304.5416094594. The cubic root of 127792661 is about 503.6961575122.

The spelling of 127792661 in words is "one hundred twenty-seven million, seven hundred ninety-two thousand, six hundred sixty-one".