691622 has 4 divisors (see below), whose sum is σ = 1037436. Its totient is φ = 345810.

The previous prime is 691591. The next prime is 691631. The reversal of 691622 is 226196.

691622 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 691591 and 691600.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 691622.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172904 + ... + 172907.

It is an arithmetic number, because the mean of its divisors is an integer number (259359).

2⁶⁹¹⁶²² is an apocalyptic number.

691622 is a deficient number, since it is larger than the sum of its proper divisors (345814).

691622 is a wasteful number, since it uses less digits than its factorization.

691622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345813.

The product of its digits is 1296, while the sum is 26.

The square root of 691622 is about 831.6381424634. The cubic root of 691622 is about 88.4347460716.

The spelling of 691622 in words is "six hundred ninety-one thousand, six hundred twenty-two".