691461 has 6 divisors (see below), whose sum is σ = 998790. Its totient is φ = 460968.

The previous prime is 691451. The next prime is 691463. The reversal of 691461 is 164196.

It can be written as a sum of positive squares in only one way, i.e., 690561 + 900 = 831^2 + 30^2 .

It is not a de Polignac number, because 691461 - 2⁷ = 691333 is a prime.

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 691461.

It is not an unprimeable number, because it can be changed into a prime (691463) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 38406 + ... + 38423.

It is an arithmetic number, because the mean of its divisors is an integer number (166465).

2⁶⁹¹⁴⁶¹ is an apocalyptic number.

It is an amenable number.

691461 is a deficient number, since it is larger than the sum of its proper divisors (307329).

691461 is a wasteful number, since it uses less digits than its factorization.

691461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76835 (or 76832 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 691461 is about 831.5413399224. The cubic root of 691461 is about 88.4278834120.

The spelling of 691461 in words is "six hundred ninety-one thousand, four hundred sixty-one".