49973509 has 2 divisors, whose sum is σ = 49973510. Its totient is φ = 49973508.

The previous prime is 49973479. The next prime is 49973533. The reversal of 49973509 is 90537994.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31024900 + 18948609 = 5570^2 + 4353^2 .

It is a cyclic number.

It is not a de Polignac number, because 49973509 - 2⁷ = 49973381 is a prime.

It is equal to p_2999638 and since 49973509 and 2999638 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49973309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24986754 + 24986755.

It is an arithmetic number, because the mean of its divisors is an integer number (24986755).

Almost surely, 2^49973509 is an apocalyptic number.

It is an amenable number.

49973509 is a deficient number, since it is larger than the sum of its proper divisors (1).

49973509 is an equidigital number, since it uses as much as digits as its factorization.

49973509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 306180, while the sum is 46.

The square root of 49973509 is about 7069.1943671114. The cubic root of 49973509 is about 368.3380759179.

The spelling of 49973509 in words is "forty-nine million, nine hundred seventy-three thousand, five hundred nine".