5427121909 has 4 divisors (see below), whose sum is σ = 5920496640. Its totient is φ = 4933747180.

The previous prime is 5427121877. The next prime is 5427121933. The reversal of 5427121909 is 9091217245.

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 5427121909 - 2⁵ = 5427121877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5427121949) 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, 246687349 + ... + 246687370.

It is an arithmetic number, because the mean of its divisors is an integer number (1480124160).

Almost surely, 2^5427121909 is an apocalyptic number.

It is an amenable number.

5427121909 is a deficient number, since it is larger than the sum of its proper divisors (493374731).

5427121909 is a wasteful number, since it uses less digits than its factorization.

5427121909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493374730.

The product of its (nonzero) digits is 45360, while the sum is 40.

The square root of 5427121909 is about 73669.0023619161. The cubic root of 5427121909 is about 1757.3429592446.

The spelling of 5427121909 in words is "five billion, four hundred twenty-seven million, one hundred twenty-one thousand, nine hundred nine".