49945981 has 8 divisors (see below), whose sum is σ = 51114240. Its totient is φ = 48786192.

The previous prime is 49945969. The next prime is 49946009. The reversal of 49945981 is 18954994.

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 49945981 - 2¹⁷ = 49814909 is a prime.

It is a super-2 number, since 2×49945981² = 4989202036104722, 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 (49945921) 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, 10696 + ... + 14638.

It is an arithmetic number, because the mean of its divisors is an integer number (6389280).

Almost surely, 2^49945981 is an apocalyptic number.

It is an amenable number.

49945981 is a deficient number, since it is larger than the sum of its proper divisors (1168259).

49945981 is a wasteful number, since it uses less digits than its factorization.

49945981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4235.

The product of its digits is 466560, while the sum is 49.

The square root of 49945981 is about 7067.2470594992. The cubic root of 49945981 is about 368.2704302583.

The spelling of 49945981 in words is "forty-nine million, nine hundred forty-five thousand, nine hundred eighty-one".