201679553 has 2 divisors, whose sum is σ = 201679554. Its totient is φ = 201679552.

The previous prime is 201679537. The next prime is 201679561. The reversal of 201679553 is 355976102.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 200987329 + 692224 = 14177^2 + 832^2 .

It is a cyclic number.

It is not a de Polignac number, because 201679553 - 2⁴ = 201679537 is a prime.

It is not a weakly prime, because it can be changed into another prime (201679453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100839776 + 100839777.

It is an arithmetic number, because the mean of its divisors is an integer number (100839777).

Almost surely, 2^201679553 is an apocalyptic number.

It is an amenable number.

201679553 is a deficient number, since it is larger than the sum of its proper divisors (1).

201679553 is an equidigital number, since it uses as much as digits as its factorization.

201679553 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56700, while the sum is 38.

The square root of 201679553 is about 14201.3926429770. The cubic root of 201679553 is about 586.4360007370.

The spelling of 201679553 in words is "two hundred one million, six hundred seventy-nine thousand, five hundred fifty-three".