49855921 has 2 divisors, whose sum is σ = 49855922. Its totient is φ = 49855920.

The previous prime is 49855889. The next prime is 49855937. The reversal of 49855921 is 12955894.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49843600 + 12321 = 7060^2 + 111^2 .

It is a cyclic number.

It is not a de Polignac number, because 49855921 - 2⁵ = 49855889 is a prime.

It is a super-2 number, since 2×49855921² = 4971225717516482, which contains 22 as substring.

It is equal to p_2992993 and since 49855921 and 2992993 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 (49855961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24927960 + 24927961.

It is an arithmetic number, because the mean of its divisors is an integer number (24927961).

Almost surely, 2^49855921 is an apocalyptic number.

It is an amenable number.

49855921 is a deficient number, since it is larger than the sum of its proper divisors (1).

49855921 is an equidigital number, since it uses as much as digits as its factorization.

49855921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129600, while the sum is 43.

The square root of 49855921 is about 7060.8725381499. The cubic root of 49855921 is about 368.0489483764.

The spelling of 49855921 in words is "forty-nine million, eight hundred fifty-five thousand, nine hundred twenty-one".