40025399 has 2 divisors, whose sum is σ = 40025400. Its totient is φ = 40025398.

The previous prime is 40025353. The next prime is 40025411. The reversal of 40025399 is 99352004.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40025399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40025099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20012699 + 20012700.

It is an arithmetic number, because the mean of its divisors is an integer number (20012700).

Almost surely, 2^40025399 is an apocalyptic number.

40025399 is a deficient number, since it is larger than the sum of its proper divisors (1).

40025399 is an equidigital number, since it uses as much as digits as its factorization.

40025399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 40025399 is about 6326.5629689429. The cubic root of 40025399 is about 342.0675601514.

The spelling of 40025399 in words is "forty million, twenty-five thousand, three hundred ninety-nine".