49889729 has 2 divisors, whose sum is σ = 49889730. Its totient is φ = 49889728.

The previous prime is 49889689. The next prime is 49889731. The reversal of 49889729 is 92798894.

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., 44249104 + 5640625 = 6652^2 + 2375^2 .

It is a cyclic number.

It is not a de Polignac number, because 49889729 - 2¹⁶ = 49824193 is a prime.

Together with 49889731, 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 (49889789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24944864 + 24944865.

It is an arithmetic number, because the mean of its divisors is an integer number (24944865).

Almost surely, 2^49889729 is an apocalyptic number.

It is an amenable number.

49889729 is a deficient number, since it is larger than the sum of its proper divisors (1).

49889729 is an equidigital number, since it uses as much as digits as its factorization.

49889729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2612736, while the sum is 56.

The square root of 49889729 is about 7063.2661708306. The cubic root of 49889729 is about 368.1321226317.

The spelling of 49889729 in words is "forty-nine million, eight hundred eighty-nine thousand, seven hundred twenty-nine".