242143691 has 2 divisors, whose sum is σ = 242143692. Its totient is φ = 242143690.

The previous prime is 242143679. The next prime is 242143711. The reversal of 242143691 is 196341242.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 242143691 - 2¹⁴ = 242127307 is a prime.

It is a super-2 number, since 2×242143691² = 117267134182206962, which contains 22 as substring.

It is a Chen prime.

It is equal to p_13272728 and since 242143691 and 13272728 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (242143091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121071845 + 121071846.

It is an arithmetic number, because the mean of its divisors is an integer number (121071846).

Almost surely, 2^242143691 is an apocalyptic number.

242143691 is a deficient number, since it is larger than the sum of its proper divisors (1).

242143691 is an equidigital number, since it uses as much as digits as its factorization.

242143691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 32.

The square root of 242143691 is about 15560.9669044054. The cubic root of 242143691 is about 623.2912823651.

The spelling of 242143691 in words is "two hundred forty-two million, one hundred forty-three thousand, six hundred ninety-one".