40292491 has 2 divisors, whose sum is σ = 40292492. Its totient is φ = 40292490.

The previous prime is 40292477. The next prime is 40292501. The reversal of 40292491 is 19429204.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40292491 - 2¹⁷ = 40161419 is a prime.

It is a Chen prime.

It is equal to p_2450389 and since 40292491 and 2450389 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 (40292411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20146245 + 20146246.

It is an arithmetic number, because the mean of its divisors is an integer number (20146246).

Almost surely, 2^40292491 is an apocalyptic number.

40292491 is a deficient number, since it is larger than the sum of its proper divisors (1).

40292491 is an equidigital number, since it uses as much as digits as its factorization.

40292491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 40292491 is about 6347.6366468159. The cubic root of 40292491 is about 342.8267533663.

The spelling of 40292491 in words is "forty million, two hundred ninety-two thousand, four hundred ninety-one".