49478779 has 8 divisors (see below), whose sum is σ = 57701600. Its totient is φ = 42410088.

The previous prime is 49478753. The next prime is 49478791. The reversal of 49478779 is 97787494.

It is not a de Polignac number, because 49478779 - 2⁷ = 49478651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49478719) 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, 71784 + ... + 72469.

It is an arithmetic number, because the mean of its divisors is an integer number (7212700).

Almost surely, 2^49478779 is an apocalyptic number.

49478779 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

49478779 is a deficient number, since it is larger than the sum of its proper divisors (8222821).

49478779 is an equidigital number, since it uses as much as digits as its factorization.

49478779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144274 (or 144260 counting only the distinct ones).

The product of its digits is 3556224, while the sum is 55.

The square root of 49478779 is about 7034.1153672655. The cubic root of 49478779 is about 367.1185459981.

The spelling of 49478779 in words is "forty-nine million, four hundred seventy-eight thousand, seven hundred seventy-nine".