49423981 has 4 divisors (see below), whose sum is σ = 52331292. Its totient is φ = 46516672.

The previous prime is 49423973. The next prime is 49423999. The reversal of 49423981 is 18932494.

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

It can be written as a sum of positive squares in 2 ways, for example, as 31741956 + 17682025 = 5634^2 + 4205^2 .

It is a cyclic number.

It is not a de Polignac number, because 49423981 - 2³ = 49423973 is a prime.

It is a super-2 number, since 2×49423981² = 4885459795776722, which contains 22 as substring.

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 a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49423181) 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, 1453630 + ... + 1453663.

It is an arithmetic number, because the mean of its divisors is an integer number (13082823).

Almost surely, 2^49423981 is an apocalyptic number.

It is an amenable number.

49423981 is a deficient number, since it is larger than the sum of its proper divisors (2907311).

49423981 is a wasteful number, since it uses less digits than its factorization.

49423981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2907310.

The product of its digits is 62208, while the sum is 40.

The square root of 49423981 is about 7030.2191288750. The cubic root of 49423981 is about 366.9829673806.

The spelling of 49423981 in words is "forty-nine million, four hundred twenty-three thousand, nine hundred eighty-one".