4999381 has 4 divisors (see below), whose sum is σ = 5009164. Its totient is φ = 4989600.

The previous prime is 4999363. The next prime is 4999387. The reversal of 4999381 is 1839994.

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 3865156 + 1134225 = 1966^2 + 1065^2 .

It is a cyclic number.

It is not a de Polignac number, because 4999381 - 2⁹ = 4998869 is a prime.

It is a super-2 number, since 2×4999381² = 49987620766322, which contains 22 as substring.

It is a d-powerful number, because it can be written as 4⁸ + 9 + 9⁵ + 9⁵ + 3¹⁴ + 8⁵ + 1 .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4999387) 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, 4080 + ... + 5161.

It is an arithmetic number, because the mean of its divisors is an integer number (1252291).

Almost surely, 2^4999381 is an apocalyptic number.

It is an amenable number.

4999381 is a deficient number, since it is larger than the sum of its proper divisors (9783).

4999381 is an equidigital number, since it uses as much as digits as its factorization.

4999381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9782.

The product of its digits is 69984, while the sum is 43.

The square root of 4999381 is about 2235.9295606078. The cubic root of 4999381 is about 170.9905378757.

The spelling of 4999381 in words is "four million, nine hundred ninety-nine thousand, three hundred eighty-one".