40706397 has 6 divisors (see below), whose sum is σ = 58798142. Its totient is φ = 27137592.

The previous prime is 40706383. The next prime is 40706411. The reversal of 40706397 is 79360704.

40706397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (40706383) and next prime (40706411).

It can be written as a sum of positive squares in only one way, i.e., 30536676 + 10169721 = 5526^2 + 3189^2 .

It is a de Polignac number, because none of the positive numbers 2^k-40706397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40707397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2261458 + ... + 2261475.

Almost surely, 2^40706397 is an apocalyptic number.

It is an amenable number.

40706397 is a deficient number, since it is larger than the sum of its proper divisors (18091745).

40706397 is a wasteful number, since it uses less digits than its factorization.

40706397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4522939 (or 4522936 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 36.

The square root of 40706397 is about 6380.1565027827. The cubic root of 40706397 is about 343.9966563809.

The spelling of 40706397 in words is "forty million, seven hundred six thousand, three hundred ninety-seven".