691034 has 4 divisors (see below), whose sum is σ = 1036554. Its totient is φ = 345516.

The previous prime is 691001. The next prime is 691037. The reversal of 691034 is 430196.

691034 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 can be written as a sum of positive squares in only one way, i.e., 644809 + 46225 = 803^2 + 215^2 .

It is not an unprimeable number, because it can be changed into a prime (691037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172757 + ... + 172760.

2⁶⁹¹⁰³⁴ is an apocalyptic number.

691034 is a deficient number, since it is larger than the sum of its proper divisors (345520).

691034 is a wasteful number, since it uses less digits than its factorization.

691034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345519.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 691034 is about 831.2845481542. The cubic root of 691034 is about 88.4096772846.

The spelling of 691034 in words is "six hundred ninety-one thousand, thirty-four".