84740989 has 8 divisors (see below), whose sum is σ = 87275360. Its totient is φ = 82219536.

The previous prime is 84740963. The next prime is 84741001. The reversal of 84740989 is 98904748.

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 84740989 - 2⁹ = 84740477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84740959) 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, 11002 + ... + 17044.

It is an arithmetic number, because the mean of its divisors is an integer number (10909420).

Almost surely, 2^84740989 is an apocalyptic number.

It is an amenable number.

84740989 is a deficient number, since it is larger than the sum of its proper divisors (2534371).

84740989 is a wasteful number, since it uses less digits than its factorization.

84740989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6459.

The product of its (nonzero) digits is 580608, while the sum is 49.

The square root of 84740989 is about 9205.4868964113. The cubic root of 84740989 is about 439.2359139010.

The spelling of 84740989 in words is "eighty-four million, seven hundred forty thousand, nine hundred eighty-nine".