39940422201 has 9 divisors (see below), whose sum is σ = 57692586991. Its totient is φ = 26626548432.

The previous prime is 39940422187. The next prime is 39940422211. The reversal of 39940422201 is 10222404993.

The square root of 39940422201 is 199851.

It is a perfect power (a square), and thus also a powerful number.

39940422201 is a `hidden beast` number, since 399 + 4 + 0 + 42 + 220 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 10791225 + 39929630976 = 3285^2 + 199824^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 39940422201 - 2¹⁷ = 39940291129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39940422211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 566245 + ... + 632861.

Almost surely, 2^39940422201 is an apocalyptic number.

39940422201 is the 199851-st square number.

39940422201 is the 99926-th centered octagonal number.

It is an amenable number.

39940422201 is a deficient number, since it is larger than the sum of its proper divisors (17752164790).

39940422201 is an frugal number, since it uses more digits than its factorization.

39940422201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133240 (or 66620 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

Multiplying 39940422201 by its sum of digits (36), we get a square (1437855199236 = 1199106²).

The spelling of 39940422201 in words is "thirty-nine billion, nine hundred forty million, four hundred twenty-two thousand, two hundred one".