49978081 has 2 divisors, whose sum is σ = 49978082. Its totient is φ = 49978080.

The previous prime is 49978069. The next prime is 49978087. The reversal of 49978081 is 18087994.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32262400 + 17715681 = 5680^2 + 4209^2 .

It is a cyclic number.

It is not a de Polignac number, because 49978081 - 2⁷ = 49977953 is a prime.

It is a super-2 number, since 2×49978081² = 4995617160885122, which contains 22 as substring.

It is equal to p_2999908 and since 49978081 and 2999908 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (49978087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24989040 + 24989041.

It is an arithmetic number, because the mean of its divisors is an integer number (24989041).

Almost surely, 2^49978081 is an apocalyptic number.

It is an amenable number.

49978081 is a deficient number, since it is larger than the sum of its proper divisors (1).

49978081 is an equidigital number, since it uses as much as digits as its factorization.

49978081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 46.

The square root of 49978081 is about 7069.5177346125. The cubic root of 49978081 is about 368.3493084713.

The spelling of 49978081 in words is "forty-nine million, nine hundred seventy-eight thousand, eighty-one".