40156903 has 2 divisors, whose sum is σ = 40156904. Its totient is φ = 40156902.

The previous prime is 40156817. The next prime is 40156913. The reversal of 40156903 is 30965104.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40156903 - 2¹³ = 40148711 is a prime.

It is a super-2 number, since 2×40156903² = 3225153717102818, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40156913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20078451 + 20078452.

It is an arithmetic number, because the mean of its divisors is an integer number (20078452).

Almost surely, 2^40156903 is an apocalyptic number.

40156903 is a deficient number, since it is larger than the sum of its proper divisors (1).

40156903 is an equidigital number, since it uses as much as digits as its factorization.

40156903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 40156903 is about 6336.9474512576. The cubic root of 40156903 is about 342.4417731837.

The spelling of 40156903 in words is "forty million, one hundred fifty-six thousand, nine hundred three".