6153981 has 4 divisors (see below), whose sum is σ = 8205312. Its totient is φ = 4102652.

The previous prime is 6153943. The next prime is 6154007. The reversal of 6153981 is 1893516.

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 6153981 - 2¹⁰ = 6152957 is a prime.

It is a super-2 number, since 2×6153981² = 75742964296722, which contains 22 as substring.

It is a D-number.

6153981 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6153911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1025661 + ... + 1025666.

It is an arithmetic number, because the mean of its divisors is an integer number (2051328).

Almost surely, 2^6153981 is an apocalyptic number.

It is an amenable number.

6153981 is a deficient number, since it is larger than the sum of its proper divisors (2051331).

6153981 is a wasteful number, since it uses less digits than its factorization.

6153981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2051330.

The product of its digits is 6480, while the sum is 33.

The square root of 6153981 is about 2480.7218707465. The cubic root of 6153981 is about 183.2534039087.

The spelling of 6153981 in words is "six million, one hundred fifty-three thousand, nine hundred eighty-one".