49920019 has 2 divisors, whose sum is σ = 49920020. Its totient is φ = 49920018.

The previous prime is 49919977. The next prime is 49920023. The reversal of 49920019 is 91002994.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 49920019 - 2¹¹ = 49917971 is a prime.

It is a super-2 number, since 2×49920019² = 4984016593920722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (49920319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24960009 + 24960010.

It is an arithmetic number, because the mean of its divisors is an integer number (24960010).

Almost surely, 2^49920019 is an apocalyptic number.

49920019 is a deficient number, since it is larger than the sum of its proper divisors (1).

49920019 is an equidigital number, since it uses as much as digits as its factorization.

49920019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 34.

The square root of 49920019 is about 7065.4100376411. The cubic root of 49920019 is about 368.2066100149.

The spelling of 49920019 in words is "forty-nine million, nine hundred twenty thousand, nineteen".