49690257 has 4 divisors (see below), whose sum is σ = 66253680. Its totient is φ = 33126836.

The previous prime is 49690231. The next prime is 49690259. The reversal of 49690257 is 75209694.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 49690257 - 2⁷ = 49690129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (49690259) 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, 8281707 + ... + 8281712.

It is an arithmetic number, because the mean of its divisors is an integer number (16563420).

Almost surely, 2^49690257 is an apocalyptic number.

It is an amenable number.

49690257 is a deficient number, since it is larger than the sum of its proper divisors (16563423).

49690257 is a wasteful number, since it uses less digits than its factorization.

49690257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16563422.

The product of its (nonzero) digits is 136080, while the sum is 42.

The square root of 49690257 is about 7049.1316486501. The cubic root of 49690257 is about 367.6408382400.

The spelling of 49690257 in words is "forty-nine million, six hundred ninety thousand, two hundred fifty-seven".