86144731 has 4 divisors (see below), whose sum is σ = 88245864. Its totient is φ = 84043600.

The previous prime is 86144713. The next prime is 86144767. The reversal of 86144731 is 13744168.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 86144731 - 2⁵ = 86144699 is a prime.

It is a super-2 number, since 2×86144731² = 14841829358124722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86144701) 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, 1050505 + ... + 1050586.

It is an arithmetic number, because the mean of its divisors is an integer number (22061466).

Almost surely, 2^86144731 is an apocalyptic number.

86144731 is a deficient number, since it is larger than the sum of its proper divisors (2101133).

86144731 is a wasteful number, since it uses less digits than its factorization.

86144731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2101132.

The product of its digits is 16128, while the sum is 34.

The square root of 86144731 is about 9281.4185876944. The cubic root of 86144731 is about 441.6479711718.

Adding to 86144731 its reverse (13744168), we get a palindrome (99888899).

The spelling of 86144731 in words is "eighty-six million, one hundred forty-four thousand, seven hundred thirty-one".