39945001 has 2 divisors, whose sum is σ = 39945002. Its totient is φ = 39945000.

The previous prime is 39944981. The next prime is 39945013. The reversal of 39945001 is 10054993.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39942400 + 2601 = 6320^2 + 51^2 .

It is a cyclic number.

It is not a de Polignac number, because 39945001 - 2⁵ = 39944969 is a prime.

It is not a weakly prime, because it can be changed into another prime (39945091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19972500 + 19972501.

It is an arithmetic number, because the mean of its divisors is an integer number (19972501).

Almost surely, 2^39945001 is an apocalyptic number.

It is an amenable number.

39945001 is a deficient number, since it is larger than the sum of its proper divisors (1).

39945001 is an equidigital number, since it uses as much as digits as its factorization.

39945001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 39945001 is about 6320.2057719666. The cubic root of 39945001 is about 341.8383724951.

Adding to 39945001 its reverse (10054993), we get a palindrome (49999994).

The spelling of 39945001 in words is "thirty-nine million, nine hundred forty-five thousand, one".