49909786 has 4 divisors (see below), whose sum is σ = 74864682. Its totient is φ = 24954892.

The previous prime is 49909777. The next prime is 49909801. The reversal of 49909786 is 68790994.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 68790994 = 2 ⋅34395497.

It can be written as a sum of positive squares in only one way, i.e., 40081561 + 9828225 = 6331^2 + 3135^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12477445 + ... + 12477448.

Almost surely, 2^49909786 is an apocalyptic number.

49909786 is a deficient number, since it is larger than the sum of its proper divisors (24954896).

49909786 is a wasteful number, since it uses less digits than its factorization.

49909786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24954895.

The product of its (nonzero) digits is 979776, while the sum is 52.

The square root of 49909786 is about 7064.6858387334. The cubic root of 49909786 is about 368.1814489953.

The spelling of 49909786 in words is "forty-nine million, nine hundred nine thousand, seven hundred eighty-six".