361691 has 8 divisors (see below), whose sum is σ = 399168. Its totient is φ = 325000.

The previous prime is 361687. The next prime is 361723. The reversal of 361691 is 196163.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 361691 - 2² = 361687 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 361691.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 361691.

It is not an unprimeable number, because it can be changed into a prime (361651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1316 + ... + 1566.

It is an arithmetic number, because the mean of its divisors is an integer number (49896).

2³⁶¹⁶⁹¹ is an apocalyptic number.

361691 is a deficient number, since it is larger than the sum of its proper divisors (37477).

361691 is a wasteful number, since it uses less digits than its factorization.

361691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393.

The product of its digits is 972, while the sum is 26.

The square root of 361691 is about 601.4075157495. The cubic root of 361691 is about 71.2490756010.

The spelling of 361691 in words is "three hundred sixty-one thousand, six hundred ninety-one".