127780077 has 8 divisors (see below), whose sum is σ = 172426464. Its totient is φ = 84160208.

The previous prime is 127780069. The next prime is 127780087. The reversal of 127780077 is 770087721.

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

It is a cyclic number.

It is not a de Polignac number, because 127780077 - 2³ = 127780069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127780057) 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 7 ways as a sum of consecutive naturals, for example, 256338 + ... + 256835.

It is an arithmetic number, because the mean of its divisors is an integer number (21553308).

Almost surely, 2^127780077 is an apocalyptic number.

It is an amenable number.

127780077 is a deficient number, since it is larger than the sum of its proper divisors (44646387).

127780077 is an equidigital number, since it uses as much as digits as its factorization.

127780077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513259.

The product of its (nonzero) digits is 38416, while the sum is 39.

The square root of 127780077 is about 11303.9850052979. The cubic root of 127780077 is about 503.6796236453.

The spelling of 127780077 in words is "one hundred twenty-seven million, seven hundred eighty thousand, seventy-seven".