49878947 has 2 divisors, whose sum is σ = 49878948. Its totient is φ = 49878946.

The previous prime is 49878931. The next prime is 49878953. The reversal of 49878947 is 74987894.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 49878947 - 2⁴ = 49878931 is a prime.

It is a Chen 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 = 49878892 and 49878901.

It is not a weakly prime, because it can be changed into another prime (49878967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24939473 + 24939474.

It is an arithmetic number, because the mean of its divisors is an integer number (24939474).

Almost surely, 2^49878947 is an apocalyptic number.

49878947 is a deficient number, since it is larger than the sum of its proper divisors (1).

49878947 is an equidigital number, since it uses as much as digits as its factorization.

49878947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4064256, while the sum is 56.

The square root of 49878947 is about 7062.5028849552. The cubic root of 49878947 is about 368.1056008967.

The spelling of 49878947 in words is "forty-nine million, eight hundred seventy-eight thousand, nine hundred forty-seven".