127978949 has 8 divisors (see below), whose sum is σ = 146361600. Its totient is φ = 109621296.

The previous prime is 127978933. The next prime is 127978957. The reversal of 127978949 is 949879721.

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 127978949 - 2⁴ = 127978933 is a prime.

It is a super-2 number, since 2×127978949² = 32757222774289202, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 127978894 and 127978903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127978349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6452 + ... + 17250.

It is an arithmetic number, because the mean of its divisors is an integer number (18295200).

Almost surely, 2^127978949 is an apocalyptic number.

It is an amenable number.

127978949 is a deficient number, since it is larger than the sum of its proper divisors (18382651).

127978949 is a wasteful number, since it uses less digits than its factorization.

127978949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12499.

The product of its digits is 2286144, while the sum is 56.

The square root of 127978949 is about 11312.7781291776. The cubic root of 127978949 is about 503.9407907370.

The spelling of 127978949 in words is "one hundred twenty-seven million, nine hundred seventy-eight thousand, nine hundred forty-nine".