49664981 has 8 divisors (see below), whose sum is σ = 53089344. Its totient is φ = 46346080.

The previous prime is 49664977. The next prime is 49665017. The reversal of 49664981 is 18946694.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 49664981 - 2² = 49664977 is a prime.

It is a super-2 number, since 2×49664981² = 4933220675460722, 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 (49664911) 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 7 ways as a sum of consecutive naturals, for example, 25391 + ... + 27276.

It is an arithmetic number, because the mean of its divisors is an integer number (6636168).

Almost surely, 2^49664981 is an apocalyptic number.

49664981 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

49664981 is a deficient number, since it is larger than the sum of its proper divisors (3424363).

49664981 is a wasteful number, since it uses less digits than its factorization.

49664981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52731.

The product of its digits is 373248, while the sum is 47.

The square root of 49664981 is about 7047.3385756610. The cubic root of 49664981 is about 367.5784915720.

The spelling of 49664981 in words is "forty-nine million, six hundred sixty-four thousand, nine hundred eighty-one".