19534961 has 2 divisors, whose sum is σ = 19534962. Its totient is φ = 19534960.

The previous prime is 19534919. The next prime is 19534973. The reversal of 19534961 is 16943591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14938225 + 4596736 = 3865^2 + 2144^2 .

It is a cyclic number.

It is not a de Polignac number, because 19534961 - 2⁶ = 19534897 is a prime.

It is a super-2 number, since 2×19534961² = 763229402543042, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (19534861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9767480 + 9767481.

It is an arithmetic number, because the mean of its divisors is an integer number (9767481).

Almost surely, 2^19534961 is an apocalyptic number.

It is an amenable number.

19534961 is a deficient number, since it is larger than the sum of its proper divisors (1).

19534961 is an equidigital number, since it uses as much as digits as its factorization.

19534961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29160, while the sum is 38.

The square root of 19534961 is about 4419.8372141969. The cubic root of 19534961 is about 269.3213914024.

The spelling of 19534961 in words is "nineteen million, five hundred thirty-four thousand, nine hundred sixty-one".