40019743 has 2 divisors, whose sum is σ = 40019744. Its totient is φ = 40019742.

The previous prime is 40019699. The next prime is 40019753. The reversal of 40019743 is 34791004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40019743 - 2¹³ = 40011551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40019753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20009871 + 20009872.

It is an arithmetic number, because the mean of its divisors is an integer number (20009872).

Almost surely, 2^40019743 is an apocalyptic number.

40019743 is a deficient number, since it is larger than the sum of its proper divisors (1).

40019743 is an equidigital number, since it uses as much as digits as its factorization.

40019743 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 40019743 is about 6326.1159489848. The cubic root of 40019743 is about 342.0514468391.

The spelling of 40019743 in words is "forty million, nineteen thousand, seven hundred forty-three".