49999381 has 4 divisors (see below), whose sum is σ = 50022700. Its totient is φ = 49976064.

The previous prime is 49999361. The next prime is 49999387. The reversal of 49999381 is 18399994.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18399994 = 2 ⋅9199997.

It can be written as a sum of positive squares in 2 ways, for example, as 19096900 + 30902481 = 4370^2 + 5559^2 .

It is a cyclic number.

It is not a de Polignac number, because 49999381 - 2⁵ = 49999349 is a prime.

It is a super-2 number, since 2×49999381² = 4999876200766322, 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 (49999387) 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, 8076 + ... + 12853.

It is an arithmetic number, because the mean of its divisors is an integer number (12505675).

Almost surely, 2^49999381 is an apocalyptic number.

It is an amenable number.

49999381 is a deficient number, since it is larger than the sum of its proper divisors (23319).

49999381 is a wasteful number, since it uses less digits than its factorization.

49999381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23318.

The product of its digits is 629856, while the sum is 52.

The square root of 49999381 is about 7071.0240418203. The cubic root of 49999381 is about 368.4016295808.

The spelling of 49999381 in words is "forty-nine million, nine hundred ninety-nine thousand, three hundred eighty-one".