40407403 has 2 divisors, whose sum is σ = 40407404. Its totient is φ = 40407402.

The previous prime is 40407397. The next prime is 40407407. The reversal of 40407403 is 30470404.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40407403 - 2⁵ = 40407371 is a prime.

It is not a weakly prime, because it can be changed into another prime (40407407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20203701 + 20203702.

It is an arithmetic number, because the mean of its divisors is an integer number (20203702).

Almost surely, 2^40407403 is an apocalyptic number.

40407403 is a deficient number, since it is larger than the sum of its proper divisors (1).

40407403 is an equidigital number, since it uses as much as digits as its factorization.

40407403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 22.

The square root of 40407403 is about 6356.6817601639. The cubic root of 40407403 is about 343.1523518043.

Adding to 40407403 its reverse (30470404), we get a palindrome (70877807).

The spelling of 40407403 in words is "forty million, four hundred seven thousand, four hundred three".