42698069 has 2 divisors, whose sum is σ = 42698070. Its totient is φ = 42698068.

The previous prime is 42698057. The next prime is 42698077. The reversal of 42698069 is 96089624.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37576900 + 5121169 = 6130^2 + 2263^2 .

It is a cyclic number.

It is not a de Polignac number, because 42698069 - 2⁸ = 42697813 is a prime.

It is a super-2 number, since 2×42698069² = 3646250192657522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42698569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21349034 + 21349035.

It is an arithmetic number, because the mean of its divisors is an integer number (21349035).

Almost surely, 2^42698069 is an apocalyptic number.

It is an amenable number.

42698069 is a deficient number, since it is larger than the sum of its proper divisors (1).

42698069 is an equidigital number, since it uses as much as digits as its factorization.

42698069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 44.

The square root of 42698069 is about 6534.3759457197. The cubic root of 42698069 is about 349.5178913247.

The spelling of 42698069 in words is "forty-two million, six hundred ninety-eight thousand, sixty-nine".