40690249 has 2 divisors, whose sum is σ = 40690250. Its totient is φ = 40690248.

The previous prime is 40690217. The next prime is 40690271. The reversal of 40690249 is 94209604.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29899024 + 10791225 = 5468^2 + 3285^2 .

It is a cyclic number.

It is not a de Polignac number, because 40690249 - 2⁵ = 40690217 is a prime.

It is not a weakly prime, because it can be changed into another prime (40690049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20345124 + 20345125.

It is an arithmetic number, because the mean of its divisors is an integer number (20345125).

Almost surely, 2^40690249 is an apocalyptic number.

It is an amenable number.

40690249 is a deficient number, since it is larger than the sum of its proper divisors (1).

40690249 is an equidigital number, since it uses as much as digits as its factorization.

40690249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 40690249 is about 6378.8908910562. The cubic root of 40690249 is about 343.9511631816.

The spelling of 40690249 in words is "forty million, six hundred ninety thousand, two hundred forty-nine".