84781994 has 8 divisors (see below), whose sum is σ = 138734208. Its totient is φ = 38537260.

The previous prime is 84781969. The next prime is 84781999. The reversal of 84781994 is 49918748.

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

It is not an unprimeable number, because it can be changed into a prime (84781999) 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, 1926842 + ... + 1926885.

It is an arithmetic number, because the mean of its divisors is an integer number (17341776).

Almost surely, 2^84781994 is an apocalyptic number.

84781994 is a deficient number, since it is larger than the sum of its proper divisors (53952214).

84781994 is a wasteful number, since it uses less digits than its factorization.

84781994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3853740.

The product of its digits is 580608, while the sum is 50.

The square root of 84781994 is about 9207.7138313481. The cubic root of 84781994 is about 439.3067492176.

The spelling of 84781994 in words is "eighty-four million, seven hundred eighty-one thousand, nine hundred ninety-four".