691454 has 4 divisors (see below), whose sum is σ = 1037184. Its totient is φ = 345726.

The previous prime is 691451. The next prime is 691463. The reversal of 691454 is 454196.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (691451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172862 + ... + 172865.

It is an arithmetic number, because the mean of its divisors is an integer number (259296).

2⁶⁹¹⁴⁵⁴ is an apocalyptic number.

691454 is a deficient number, since it is larger than the sum of its proper divisors (345730).

691454 is a wasteful number, since it uses less digits than its factorization.

691454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345729.

The product of its digits is 4320, while the sum is 29.

The square root of 691454 is about 831.5371308607. The cubic root of 691454 is about 88.4275850114.

The spelling of 691454 in words is "six hundred ninety-one thousand, four hundred fifty-four".