19472561 has 2 divisors, whose sum is σ = 19472562. Its totient is φ = 19472560.

The previous prime is 19472527. The next prime is 19472591. The reversal of 19472561 is 16527491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19088161 + 384400 = 4369^2 + 620^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19472561 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (19472521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9736280 + 9736281.

It is an arithmetic number, because the mean of its divisors is an integer number (9736281).

Almost surely, 2^19472561 is an apocalyptic number.

It is an amenable number.

19472561 is a deficient number, since it is larger than the sum of its proper divisors (1).

19472561 is an equidigital number, since it uses as much as digits as its factorization.

19472561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15120, while the sum is 35.

The square root of 19472561 is about 4412.7724845045. The cubic root of 19472561 is about 269.0343235041.

The spelling of 19472561 in words is "nineteen million, four hundred seventy-two thousand, five hundred sixty-one".