40308743 has 2 divisors, whose sum is σ = 40308744. Its totient is φ = 40308742.

The previous prime is 40308733. The next prime is 40308757. The reversal of 40308743 is 34780304.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40308743 - 2⁴ = 40308727 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40308713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20154371 + 20154372.

It is an arithmetic number, because the mean of its divisors is an integer number (20154372).

Almost surely, 2^40308743 is an apocalyptic number.

40308743 is a deficient number, since it is larger than the sum of its proper divisors (1).

40308743 is an equidigital number, since it uses as much as digits as its factorization.

40308743 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 40308743 is about 6348.9166792454. The cubic root of 40308743 is about 342.8728402949.

The spelling of 40308743 in words is "forty million, three hundred eight thousand, seven hundred forty-three".