49940257 has 4 divisors (see below), whose sum is σ = 50882580. Its totient is φ = 48997936.

The previous prime is 49940239. The next prime is 49940279. The reversal of 49940257 is 75204994.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75204994 = 2 ⋅37602497.

It can be written as a sum of positive squares in 2 ways, for example, as 45104656 + 4835601 = 6716^2 + 2199^2 .

It is a cyclic number.

It is not a de Polignac number, because 49940257 - 2²³ = 41551649 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49940207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 471082 + ... + 471187.

It is an arithmetic number, because the mean of its divisors is an integer number (12720645).

Almost surely, 2^49940257 is an apocalyptic number.

It is an amenable number.

49940257 is a deficient number, since it is larger than the sum of its proper divisors (942323).

49940257 is an equidigital number, since it uses as much as digits as its factorization.

49940257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 942322.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 49940257 is about 7066.8420811562. The cubic root of 49940257 is about 368.2563613220.

The spelling of 49940257 in words is "forty-nine million, nine hundred forty thousand, two hundred fifty-seven".