49681906 has 4 divisors (see below), whose sum is σ = 74522862. Its totient is φ = 24840952.

The previous prime is 49681897. The next prime is 49681921. The reversal of 49681906 is 60918694.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 28143025 + 21538881 = 5305^2 + 4641^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12420475 + ... + 12420478.

Almost surely, 2^49681906 is an apocalyptic number.

49681906 is a deficient number, since it is larger than the sum of its proper divisors (24840956).

49681906 is a wasteful number, since it uses less digits than its factorization.

49681906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24840955.

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 49681906 is about 7048.5392812979. The cubic root of 49681906 is about 367.6202417098.

Subtracting from 49681906 its product of nonzero digits (93312), we obtain a palindrome (49588594).

The spelling of 49681906 in words is "forty-nine million, six hundred eighty-one thousand, nine hundred six".