1013691 has 8 divisors (see below), whose sum is σ = 1544704. Its totient is φ = 579240.

The previous prime is 1013687. The next prime is 1013699. The reversal of 1013691 is 1963101.

It is a happy number.

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

It is not a de Polignac number, because 1013691 - 2² = 1013687 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 48271 = 1013691 / (1 + 0 + 1 + 3 + 6 + 9 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1013699) 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, 24115 + ... + 24156.

It is an arithmetic number, because the mean of its divisors is an integer number (193088).

2^1013691 is an apocalyptic number.

1013691 is a deficient number, since it is larger than the sum of its proper divisors (531013).

1013691 is an equidigital number, since it uses as much as digits as its factorization.

1013691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48281.

The product of its (nonzero) digits is 162, while the sum is 21.

The square root of 1013691 is about 1006.8222285985. The cubic root of 1013691 is about 100.4542996595.

Adding to 1013691 its reverse (1963101), we get a palindrome (2976792).

The spelling of 1013691 in words is "one million, thirteen thousand, six hundred ninety-one".