49880021 has 2 divisors, whose sum is σ = 49880022. Its totient is φ = 49880020.

The previous prime is 49879987. The next prime is 49880041. The reversal of 49880021 is 12008894.

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., 39062500 + 10817521 = 6250^2 + 3289^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49880021 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 49880021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49880041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24940010 + 24940011.

It is an arithmetic number, because the mean of its divisors is an integer number (24940011).

Almost surely, 2^49880021 is an apocalyptic number.

It is an amenable number.

49880021 is a deficient number, since it is larger than the sum of its proper divisors (1).

49880021 is an equidigital number, since it uses as much as digits as its factorization.

49880021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 49880021 is about 7062.5789199130. The cubic root of 49880021 is about 368.1082429104.

The spelling of 49880021 in words is "forty-nine million, eight hundred eighty thousand, twenty-one".