84890719 has 4 divisors (see below), whose sum is σ = 85167544. Its totient is φ = 84613896.

The previous prime is 84890681. The next prime is 84890731. The reversal of 84890719 is 91709848.

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 84890719 - 2⁷ = 84890591 is a prime.

It is a super-2 number, since 2×84890719² = 14412868344673922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84890779) 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, 137952 + ... + 138565.

It is an arithmetic number, because the mean of its divisors is an integer number (21291886).

Almost surely, 2^84890719 is an apocalyptic number.

84890719 is a deficient number, since it is larger than the sum of its proper divisors (276825).

84890719 is a wasteful number, since it uses less digits than its factorization.

84890719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276824.

The product of its (nonzero) digits is 145152, while the sum is 46.

The square root of 84890719 is about 9213.6159568326. The cubic root of 84890719 is about 439.4944589782.

The spelling of 84890719 in words is "eighty-four million, eight hundred ninety thousand, seven hundred nineteen".