127919329477 has 4 divisors (see below), whose sum is σ = 127934818720. Its totient is φ = 127903840236.

The previous prime is 127919329459. The next prime is 127919329507. The reversal of 127919329477 is 774923919721.

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 a de Polignac number, because none of the positive numbers 2^k-127919329477 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 (127919329177) 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, 7732227 + ... + 7748752.

It is an arithmetic number, because the mean of its divisors is an integer number (31983704680).

Almost surely, 2^127919329477 is an apocalyptic number.

It is an amenable number.

127919329477 is a deficient number, since it is larger than the sum of its proper divisors (15489243).

127919329477 is an equidigital number, since it uses as much as digits as its factorization.

127919329477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15489242.

The product of its digits is 12002256, while the sum is 61.

The spelling of 127919329477 in words is "one hundred twenty-seven billion, nine hundred nineteen million, three hundred twenty-nine thousand, four hundred seventy-seven".