49779945 has 24 divisors (see below), whose sum is σ = 88393032. Its totient is φ = 25900800.

The previous prime is 49779937. The next prime is 49779953. The reversal of 49779945 is 54997794.

It is an interprime number because it is at equal distance from previous prime (49779937) and next prime (49779953).

It can be written as a sum of positive squares in 4 ways, for example, as 1671849 + 48108096 = 1293^2 + 6936^2 .

It is not a de Polignac number, because 49779945 - 2³ = 49779937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 49779891 and 49779900.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11646 + ... + 15335.

It is an arithmetic number, because the mean of its divisors is an integer number (3683043).

Almost surely, 2^49779945 is an apocalyptic number.

49779945 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

49779945 is a deficient number, since it is larger than the sum of its proper divisors (38613087).

49779945 is a wasteful number, since it uses less digits than its factorization.

49779945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27033 (or 27030 counting only the distinct ones).

The product of its digits is 2857680, while the sum is 54.

The square root of 49779945 is about 7055.4904152724. The cubic root of 49779945 is about 367.8618953464.

The spelling of 49779945 in words is "forty-nine million, seven hundred seventy-nine thousand, nine hundred forty-five".