6156389 has 4 divisors (see below), whose sum is σ = 6287424. Its totient is φ = 6025356.

The previous prime is 6156379. The next prime is 6156407. The reversal of 6156389 is 9836516.

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 6156389 - 2⁴ = 6156373 is a prime.

It is a super-2 number, since 2×6156389² = 75802251038642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6156349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65447 + ... + 65540.

It is an arithmetic number, because the mean of its divisors is an integer number (1571856).

Almost surely, 2^6156389 is an apocalyptic number.

It is an amenable number.

6156389 is a deficient number, since it is larger than the sum of its proper divisors (131035).

6156389 is a wasteful number, since it uses less digits than its factorization.

6156389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131034.

The product of its digits is 38880, while the sum is 38.

The square root of 6156389 is about 2481.2071658771. The cubic root of 6156389 is about 183.2773026204.

The spelling of 6156389 in words is "six million, one hundred fifty-six thousand, three hundred eighty-nine".