49902217 has 2 divisors, whose sum is σ = 49902218. Its totient is φ = 49902216.

The previous prime is 49902199. The next prime is 49902221. The reversal of 49902217 is 71220994.

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., 34386496 + 15515721 = 5864^2 + 3939^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49902217 is a prime.

It is not a weakly prime, because it can be changed into another prime (49902247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24951108 + 24951109.

It is an arithmetic number, because the mean of its divisors is an integer number (24951109).

Almost surely, 2^49902217 is an apocalyptic number.

It is an amenable number.

49902217 is a deficient number, since it is larger than the sum of its proper divisors (1).

49902217 is an equidigital number, since it uses as much as digits as its factorization.

49902217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 49902217 is about 7064.1501258113. The cubic root of 49902217 is about 368.1628360372.

The spelling of 49902217 in words is "forty-nine million, nine hundred two thousand, two hundred seventeen".