40972643 has 2 divisors, whose sum is σ = 40972644. Its totient is φ = 40972642.

The previous prime is 40972619. The next prime is 40972649. The reversal of 40972643 is 34627904.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40972643 - 2¹⁶ = 40907107 is a prime.

It is not a weakly prime, because it can be changed into another prime (40972649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20486321 + 20486322.

It is an arithmetic number, because the mean of its divisors is an integer number (20486322).

Almost surely, 2^40972643 is an apocalyptic number.

40972643 is a deficient number, since it is larger than the sum of its proper divisors (1).

40972643 is an equidigital number, since it uses as much as digits as its factorization.

40972643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 40972643 is about 6400.9876581665. The cubic root of 40972643 is about 344.7450135766.

The spelling of 40972643 in words is "forty million, nine hundred seventy-two thousand, six hundred forty-three".