40742893 has 2 divisors, whose sum is σ = 40742894. Its totient is φ = 40742892.

The previous prime is 40742869. The next prime is 40742903. The reversal of 40742893 is 39824704.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40678884 + 64009 = 6378^2 + 253^2 .

It is a cyclic number.

It is not a de Polignac number, because 40742893 - 2⁹ = 40742381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40742393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20371446 + 20371447.

It is an arithmetic number, because the mean of its divisors is an integer number (20371447).

Almost surely, 2^40742893 is an apocalyptic number.

It is an amenable number.

40742893 is a deficient number, since it is larger than the sum of its proper divisors (1).

40742893 is an equidigital number, since it uses as much as digits as its factorization.

40742893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 40742893 is about 6383.0159799267. The cubic root of 40742893 is about 344.0994309878.

The spelling of 40742893 in words is "forty million, seven hundred forty-two thousand, eight hundred ninety-three".