40362691 has 2 divisors, whose sum is σ = 40362692. Its totient is φ = 40362690.

The previous prime is 40362653. The next prime is 40362701. The reversal of 40362691 is 19626304.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40362691 - 2⁷ = 40362563 is a prime.

It is a super-2 number, since 2×40362691² = 3258293649522962, which contains 22 as substring.

It is equal to p_2454439 and since 40362691 and 2454439 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (40362991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20181345 + 20181346.

It is an arithmetic number, because the mean of its divisors is an integer number (20181346).

Almost surely, 2^40362691 is an apocalyptic number.

40362691 is a deficient number, since it is larger than the sum of its proper divisors (1).

40362691 is an equidigital number, since it uses as much as digits as its factorization.

40362691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 40362691 is about 6353.1638574808. The cubic root of 40362691 is about 343.0257356443.

Adding to 40362691 its reverse (19626304), we get a palindrome (59988995).

The spelling of 40362691 in words is "forty million, three hundred sixty-two thousand, six hundred ninety-one".