49217989 has 2 divisors, whose sum is σ = 49217990. Its totient is φ = 49217988.

The previous prime is 49217983. The next prime is 49218041. The reversal of 49217989 is 98971294.

49217989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46689889 + 2528100 = 6833^2 + 1590^2 .

It is a cyclic number.

It is not a de Polignac number, because 49217989 - 2⁹ = 49217477 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49217983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24608994 + 24608995.

It is an arithmetic number, because the mean of its divisors is an integer number (24608995).

Almost surely, 2^49217989 is an apocalyptic number.

It is an amenable number.

49217989 is a deficient number, since it is larger than the sum of its proper divisors (1).

49217989 is an equidigital number, since it uses as much as digits as its factorization.

49217989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 49.

The square root of 49217989 is about 7015.5533637768. The cubic root of 49217989 is about 366.4724134517.

It can be divided in two parts, 492 and 17989, that multiplied together give a palindrome (8850588).

The spelling of 49217989 in words is "forty-nine million, two hundred seventeen thousand, nine hundred eighty-nine".