84149731 has 8 divisors (see below), whose sum is σ = 85201200. Its totient is φ = 83102208.

The previous prime is 84149713. The next prime is 84149761. The reversal of 84149731 is 13794148.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 84149731 - 2⁵ = 84149699 is a prime.

It is a super-2 number, since 2×84149731² = 14162354454744722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84149701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79695 + ... + 80743.

It is an arithmetic number, because the mean of its divisors is an integer number (10650150).

Almost surely, 2^84149731 is an apocalyptic number.

84149731 is a deficient number, since it is larger than the sum of its proper divisors (1051469).

84149731 is a wasteful number, since it uses less digits than its factorization.

84149731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1973.

The product of its digits is 24192, while the sum is 37.

The square root of 84149731 is about 9173.3162487729. The cubic root of 84149731 is about 438.2119776945.

It can be divided in two parts, 8414 and 9731, that added together give a triangular number (18145 = T₁₉₀).

The spelling of 84149731 in words is "eighty-four million, one hundred forty-nine thousand, seven hundred thirty-one".