19961069 has 2 divisors, whose sum is σ = 19961070. Its totient is φ = 19961068.

The previous prime is 19961059. The next prime is 19961099. The reversal of 19961069 is 96016991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19695844 + 265225 = 4438^2 + 515^2 .

It is a cyclic number.

It is not a de Polignac number, because 19961069 - 2⁸ = 19960813 is a prime.

It is a super-2 number, since 2×19961069² = 796888551245522, which contains 22 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 (19961059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9980534 + 9980535.

It is an arithmetic number, because the mean of its divisors is an integer number (9980535).

Almost surely, 2^19961069 is an apocalyptic number.

It is an amenable number.

19961069 is a deficient number, since it is larger than the sum of its proper divisors (1).

19961069 is an equidigital number, since it uses as much as digits as its factorization.

19961069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26244, while the sum is 41.

The square root of 19961069 is about 4467.7812166667. The cubic root of 19961069 is about 271.2655222700.

The spelling of 19961069 in words is "nineteen million, nine hundred sixty-one thousand, sixty-nine".