5391261989 has 4 divisors (see below), whose sum is σ = 5675012640. Its totient is φ = 5107511340.

The previous prime is 5391261977. The next prime is 5391261991. The reversal of 5391261989 is 9891621935.

It is a happy number.

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 5391261989 - 2⁴ = 5391261973 is a prime.

It is a super-2 number, since 2×5391261989² = 58131411668072472242, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5391261989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5391261959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 141875297 + ... + 141875334.

It is an arithmetic number, because the mean of its divisors is an integer number (1418753160).

Almost surely, 2^5391261989 is an apocalyptic number.

It is an amenable number.

5391261989 is a deficient number, since it is larger than the sum of its proper divisors (283750651).

5391261989 is a wasteful number, since it uses less digits than its factorization.

5391261989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283750650.

The product of its digits is 1049760, while the sum is 53.

The square root of 5391261989 is about 73425.2135781708. The cubic root of 5391261989 is about 1753.4638320810.

The spelling of 5391261989 in words is "five billion, three hundred ninety-one million, two hundred sixty-one thousand, nine hundred eighty-nine".