40156723 has 2 divisors, whose sum is σ = 40156724. Its totient is φ = 40156722.

The previous prime is 40156693. The next prime is 40156733. The reversal of 40156723 is 32765104.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40156723 is a prime.

It is a super-2 number, since 2×40156723² = 3225124804197458, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40156691 and 40156700.

It is not a weakly prime, because it can be changed into another prime (40156733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20078361 + 20078362.

It is an arithmetic number, because the mean of its divisors is an integer number (20078362).

Almost surely, 2^40156723 is an apocalyptic number.

40156723 is a deficient number, since it is larger than the sum of its proper divisors (1).

40156723 is an equidigital number, since it uses as much as digits as its factorization.

40156723 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 40156723 is about 6336.9332488200. The cubic root of 40156723 is about 342.4412615273.

The spelling of 40156723 in words is "forty million, one hundred fifty-six thousand, seven hundred twenty-three".