49998821 has 2 divisors, whose sum is σ = 49998822. Its totient is φ = 49998820.

The previous prime is 49998811. The next prime is 49998827. The reversal of 49998821 is 12889994.

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., 37957921 + 12040900 = 6161^2 + 3470^2 .

It is a cyclic number.

It is not a de Polignac number, because 49998821 - 2¹⁴ = 49982437 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 49998821.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49998827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24999410 + 24999411.

It is an arithmetic number, because the mean of its divisors is an integer number (24999411).

Almost surely, 2^49998821 is an apocalyptic number.

It is an amenable number.

49998821 is a deficient number, since it is larger than the sum of its proper divisors (1).

49998821 is an equidigital number, since it uses as much as digits as its factorization.

49998821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 373248, while the sum is 50.

The square root of 49998821 is about 7070.9844434845. The cubic root of 49998821 is about 368.4002541925.

The spelling of 49998821 in words is "forty-nine million, nine hundred ninety-eight thousand, eight hundred twenty-one".