4013691 has 12 divisors (see below), whose sum is σ = 5882856. Its totient is φ = 2432320.

The previous prime is 4013671. The next prime is 4013699. The reversal of 4013691 is 1963104.

It is not a de Polignac number, because 4013691 - 2⁷ = 4013563 is a prime.

It is a super-2 number, since 2×4013691² = 32219430886962, which contains 22 as substring.

It is an Ulam number.

4013691 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (4013699) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5166 + ... + 5891.

It is an arithmetic number, because the mean of its divisors is an integer number (490238).

Almost surely, 2^4013691 is an apocalyptic number.

4013691 is a deficient number, since it is larger than the sum of its proper divisors (1869165).

4013691 is a wasteful number, since it uses less digits than its factorization.

4013691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11082 (or 11071 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 4013691 is about 2003.4198261972. The cubic root of 4013691 is about 158.9210081900.

Adding to 4013691 its reverse (1963104), we get a palindrome (5976795).

It can be divided in two parts, 40 and 13691, that added together give a palindrome (13731).

The spelling of 4013691 in words is "four million, thirteen thousand, six hundred ninety-one".