40690197 has 48 divisors (see below), whose sum is σ = 67212288. Its totient is φ = 23569920.

The previous prime is 40690193. The next prime is 40690201. The reversal of 40690197 is 79109604.

It is an interprime number because it is at equal distance from previous prime (40690193) and next prime (40690201).

It is not a de Polignac number, because 40690197 - 2² = 40690193 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40690193) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 108903 + ... + 109275.

It is an arithmetic number, because the mean of its divisors is an integer number (1400256).

Almost surely, 2^40690197 is an apocalyptic number.

It is an amenable number.

40690197 is a deficient number, since it is larger than the sum of its proper divisors (26522091).

40690197 is a wasteful number, since it uses less digits than its factorization.

40690197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450 (or 447 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 40690197 is about 6378.8868151112. The cubic root of 40690197 is about 343.9510166643.

The spelling of 40690197 in words is "forty million, six hundred ninety thousand, one hundred ninety-seven".