49175981 has 4 divisors (see below), whose sum is σ = 49201632. Its totient is φ = 49150332.

The previous prime is 49175963. The next prime is 49175983. The reversal of 49175981 is 18957194.

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, and also an emirpimes, since its reverse is a distinct semiprime: 18957194 = 2 ⋅9478597.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49175981 is a prime.

It is a super-2 number, since 2×49175981² = 4836554214624722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49175983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9695 + ... + 13868.

It is an arithmetic number, because the mean of its divisors is an integer number (12300408).

Almost surely, 2^49175981 is an apocalyptic number.

It is an amenable number.

49175981 is a deficient number, since it is larger than the sum of its proper divisors (25651).

49175981 is a wasteful number, since it uses less digits than its factorization.

49175981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25650.

The product of its digits is 90720, while the sum is 44.

The square root of 49175981 is about 7012.5588054575. The cubic root of 49175981 is about 366.3681212651.

The spelling of 49175981 in words is "forty-nine million, one hundred seventy-five thousand, nine hundred eighty-one".