40375921 has 2 divisors, whose sum is σ = 40375922. Its totient is φ = 40375920.

The previous prime is 40375913. The next prime is 40375927. The reversal of 40375921 is 12957304.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32890225 + 7485696 = 5735^2 + 2736^2 .

It is a cyclic number.

It is not a de Polignac number, because 40375921 - 2³ = 40375913 is a prime.

It is not a weakly prime, because it can be changed into another prime (40375927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20187960 + 20187961.

It is an arithmetic number, because the mean of its divisors is an integer number (20187961).

Almost surely, 2^40375921 is an apocalyptic number.

It is an amenable number.

40375921 is a deficient number, since it is larger than the sum of its proper divisors (1).

40375921 is an equidigital number, since it uses as much as digits as its factorization.

40375921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 40375921 is about 6354.2049856768. The cubic root of 40375921 is about 343.0632103073.

The spelling of 40375921 in words is "forty million, three hundred seventy-five thousand, nine hundred twenty-one".