39975553 has 2 divisors, whose sum is σ = 39975554. Its totient is φ = 39975552.

The previous prime is 39975473. The next prime is 39975583. The reversal of 39975553 is 35557993.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25482304 + 14493249 = 5048^2 + 3807^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39975553 is a prime.

It is not a weakly prime, because it can be changed into another prime (39975583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19987776 + 19987777.

It is an arithmetic number, because the mean of its divisors is an integer number (19987777).

Almost surely, 2^39975553 is an apocalyptic number.

It is an amenable number.

39975553 is a deficient number, since it is larger than the sum of its proper divisors (1).

39975553 is an equidigital number, since it uses as much as digits as its factorization.

39975553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 637875, while the sum is 46.

The square root of 39975553 is about 6322.6223198923. The cubic root of 39975553 is about 341.9255021664.

The spelling of 39975553 in words is "thirty-nine million, nine hundred seventy-five thousand, five hundred fifty-three".