5147781 has 4 divisors (see below), whose sum is σ = 6863712. Its totient is φ = 3431852.

The previous prime is 5147749. The next prime is 5147789. The reversal of 5147781 is 1877415.

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.

It is a cyclic number.

It is not a de Polignac number, because 5147781 - 2⁵ = 5147749 is a prime.

It is a super-2 number, since 2×5147781² = 52999298447922, which contains 22 as substring.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5147789) 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, 857961 + ... + 857966.

It is an arithmetic number, because the mean of its divisors is an integer number (1715928).

Almost surely, 2^5147781 is an apocalyptic number.

It is an amenable number.

5147781 is a deficient number, since it is larger than the sum of its proper divisors (1715931).

5147781 is a wasteful number, since it uses less digits than its factorization.

5147781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1715930.

The product of its digits is 7840, while the sum is 33.

The square root of 5147781 is about 2268.8721867924. The cubic root of 5147781 is about 172.6659440712.

The spelling of 5147781 in words is "five million, one hundred forty-seven thousand, seven hundred eighty-one".