84690894289 has 9 divisors (see below), whose sum is σ = 85124088273. Its totient is φ = 84259898112.

The previous prime is 84690894271. The next prime is 84690894307. The reversal of 84690894289 is 98249809648.

The square root of 84690894289 is 291017.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (84690894271) and next prime (84690894307).

It can be written as a sum of positive squares in 4 ways, for example, as 13406166225 + 71284728064 = 115785^2 + 266992^2 .

It is not a de Polignac number, because 84690894289 - 2⁷ = 84690894161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84690892289) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 67806337 + ... + 67807585.

Almost surely, 2^84690894289 is an apocalyptic number.

84690894289 is the 291017-th square number.

84690894289 is the 145509-th centered octagonal number.

It is an amenable number.

84690894289 is a deficient number, since it is larger than the sum of its proper divisors (433193984).

84690894289 is an frugal number, since it uses more digits than its factorization.

84690894289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2964 (or 1482 counting only the distinct ones).

The product of its (nonzero) digits is 71663616, while the sum is 67.

The spelling of 84690894289 in words is "eighty-four billion, six hundred ninety million, eight hundred ninety-four thousand, two hundred eighty-nine".