40067399 has 2 divisors, whose sum is σ = 40067400. Its totient is φ = 40067398.

The previous prime is 40067393. The next prime is 40067429. The reversal of 40067399 is 99376004.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40067399 - 2⁴ = 40067383 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40067393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20033699 + 20033700.

It is an arithmetic number, because the mean of its divisors is an integer number (20033700).

Almost surely, 2^40067399 is an apocalyptic number.

40067399 is a deficient number, since it is larger than the sum of its proper divisors (1).

40067399 is an equidigital number, since it uses as much as digits as its factorization.

40067399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 38.

The square root of 40067399 is about 6329.8814364884. The cubic root of 40067399 is about 342.1871659984.

The spelling of 40067399 in words is "forty million, sixty-seven thousand, three hundred ninety-nine".