49816621 has 2 divisors, whose sum is σ = 49816622. Its totient is φ = 49816620.

The previous prime is 49816607. The next prime is 49816633. The reversal of 49816621 is 12661894.

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., 47817225 + 1999396 = 6915^2 + 1414^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49816621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49816021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24908310 + 24908311.

It is an arithmetic number, because the mean of its divisors is an integer number (24908311).

Almost surely, 2^49816621 is an apocalyptic number.

It is an amenable number.

49816621 is a deficient number, since it is larger than the sum of its proper divisors (1).

49816621 is an equidigital number, since it uses as much as digits as its factorization.

49816621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 37.

The square root of 49816621 is about 7058.0890473272. The cubic root of 49816621 is about 367.9522154598.

The spelling of 49816621 in words is "forty-nine million, eight hundred sixteen thousand, six hundred twenty-one".