49878545 has 4 divisors (see below), whose sum is σ = 59854260. Its totient is φ = 39902832.

The previous prime is 49878533. The next prime is 49878557. The reversal of 49878545 is 54587894.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (49878533) and next prime (49878557).

It can be written as a sum of positive squares in 2 ways, for example, as 32581264 + 17297281 = 5708^2 + 4159^2 .

It is a cyclic number.

It is not a de Polignac number, because 49878545 - 2⁶ = 49878481 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 49878493 and 49878502.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4987850 + ... + 4987859.

It is an arithmetic number, because the mean of its divisors is an integer number (14963565).

Almost surely, 2^49878545 is an apocalyptic number.

It is an amenable number.

49878545 is a deficient number, since it is larger than the sum of its proper divisors (9975715).

49878545 is an equidigital number, since it uses as much as digits as its factorization.

49878545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9975714.

The product of its digits is 1612800, while the sum is 50.

The square root of 49878545 is about 7062.4744247325. The cubic root of 49878545 is about 368.1046119768.

The spelling of 49878545 in words is "forty-nine million, eight hundred seventy-eight thousand, five hundred forty-five".