5309402781 has 4 divisors (see below), whose sum is σ = 7079203712. Its totient is φ = 3539601852.

The previous prime is 5309402773. The next prime is 5309402831. The reversal of 5309402781 is 1872049035.

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 not a de Polignac number, because 5309402781 - 2³ = 5309402773 is a prime.

It is a super-2 number, since 2×5309402781² = 56379515781781067922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5309402771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 884900461 + ... + 884900466.

It is an arithmetic number, because the mean of its divisors is an integer number (1769800928).

Almost surely, 2^5309402781 is an apocalyptic number.

It is an amenable number.

5309402781 is a deficient number, since it is larger than the sum of its proper divisors (1769800931).

5309402781 is a wasteful number, since it uses less digits than its factorization.

5309402781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1769800930.

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 5309402781 is about 72865.6488408633. The cubic root of 5309402781 is about 1744.5438534276.

The spelling of 5309402781 in words is "five billion, three hundred nine million, four hundred two thousand, seven hundred eighty-one".