40189243 has 2 divisors, whose sum is σ = 40189244. Its totient is φ = 40189242.

The previous prime is 40189231. The next prime is 40189249. The reversal of 40189243 is 34298104.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40189243 - 2²¹ = 38092091 is a prime.

It is not a weakly prime, because it can be changed into another prime (40189249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20094621 + 20094622.

It is an arithmetic number, because the mean of its divisors is an integer number (20094622).

Almost surely, 2^40189243 is an apocalyptic number.

40189243 is a deficient number, since it is larger than the sum of its proper divisors (1).

40189243 is an equidigital number, since it uses as much as digits as its factorization.

40189243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 40189243 is about 6339.4986394825. The cubic root of 40189243 is about 342.5336759826.

The spelling of 40189243 in words is "forty million, one hundred eighty-nine thousand, two hundred forty-three".