19649141 has 2 divisors, whose sum is σ = 19649142. Its totient is φ = 19649140.

The previous prime is 19649111. The next prime is 19649219. The reversal of 19649141 is 14194691.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10923025 + 8726116 = 3305^2 + 2954^2 .

It is a cyclic number.

It is not a de Polignac number, because 19649141 - 2²² = 15454837 is a prime.

It is a super-3 number, since 3×19649141³ (a number of 23 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19649101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9824570 + 9824571.

It is an arithmetic number, because the mean of its divisors is an integer number (9824571).

Almost surely, 2^19649141 is an apocalyptic number.

It is an amenable number.

19649141 is a deficient number, since it is larger than the sum of its proper divisors (1).

19649141 is an equidigital number, since it uses as much as digits as its factorization.

19649141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 35.

The square root of 19649141 is about 4432.7351601466. The cubic root of 19649141 is about 269.8450917535.

The spelling of 19649141 in words is "nineteen million, six hundred forty-nine thousand, one hundred forty-one".