49817819 has 2 divisors, whose sum is σ = 49817820. Its totient is φ = 49817818.

The previous prime is 49817797. The next prime is 49817821. The reversal of 49817819 is 91871894.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49817819 is a prime.

It is a super-2 number, since 2×49817819² = 4963630179833522, which contains 22 as substring.

Together with 49817821, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (49817849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24908909 + 24908910.

It is an arithmetic number, because the mean of its divisors is an integer number (24908910).

Almost surely, 2^49817819 is an apocalyptic number.

49817819 is a deficient number, since it is larger than the sum of its proper divisors (1).

49817819 is an equidigital number, since it uses as much as digits as its factorization.

49817819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 47.

The square root of 49817819 is about 7058.1739139809. The cubic root of 49817819 is about 367.9551649655.

The spelling of 49817819 in words is "forty-nine million, eight hundred seventeen thousand, eight hundred nineteen".