84101690 has 16 divisors (see below), whose sum is σ = 152883720. Its totient is φ = 33307200.

The previous prime is 84101651. The next prime is 84101713. The reversal of 84101690 is 9610148.

It can be written as a sum of positive squares in 4 ways, for example, as 82937449 + 1164241 = 9107^2 + 1079^2 .

It is a super-2 number, since 2×84101690² = 14146188521712200, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40625 + ... + 42644.

Almost surely, 2^84101690 is an apocalyptic number.

84101690 is a deficient number, since it is larger than the sum of its proper divisors (68782030).

84101690 is a wasteful number, since it uses less digits than its factorization.

84101690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83377.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 84101690 is about 9170.6973562538. The cubic root of 84101690 is about 438.1285702221.

It can be divided in two parts, 8410 and 1690, that multiplied together give a square (14212900 = 3770²).

The spelling of 84101690 in words is "eighty-four million, one hundred one thousand, six hundred ninety".