84149281 has 8 divisors (see below), whose sum is σ = 85728960. Its totient is φ = 82574832.

The previous prime is 84149267. The next prime is 84149287. The reversal of 84149281 is 18294148.

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 84149281 - 2¹⁹ = 83624993 is a prime.

It is a super-2 number, since 2×84149281² = 14162202985633922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 84149281.

It is not an unprimeable number, because it can be changed into a prime (84149287) 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, 47691 + ... + 49423.

It is an arithmetic number, because the mean of its divisors is an integer number (10716120).

Almost surely, 2^84149281 is an apocalyptic number.

It is an amenable number.

84149281 is a deficient number, since it is larger than the sum of its proper divisors (1579679).

84149281 is a wasteful number, since it uses less digits than its factorization.

84149281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2615.

The product of its digits is 18432, while the sum is 37.

The square root of 84149281 is about 9173.2917210781. The cubic root of 84149281 is about 438.2111965641.

The spelling of 84149281 in words is "eighty-four million, one hundred forty-nine thousand, two hundred eighty-one".