40697829 has 16 divisors (see below), whose sum is σ = 63467200. Its totient is φ = 25703568.

The previous prime is 40697821. The next prime is 40697837. The reversal of 40697829 is 92879604.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (40697821) and next prime (40697837).

It is not a de Polignac number, because 40697829 - 2³ = 40697821 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 (40697821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39154 + ... + 40179.

It is an arithmetic number, because the mean of its divisors is an integer number (3966700).

Almost surely, 2^40697829 is an apocalyptic number.

It is an amenable number.

40697829 is a deficient number, since it is larger than the sum of its proper divisors (22769371).

40697829 is a wasteful number, since it uses less digits than its factorization.

40697829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79361 (or 79355 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 40697829 is about 6379.4850105632. The cubic root of 40697829 is about 343.9725195508.

The spelling of 40697829 in words is "forty million, six hundred ninety-seven thousand, eight hundred twenty-nine".