243698051 has 2 divisors, whose sum is σ = 243698052. Its totient is φ = 243698050.

The previous prime is 243698027. The next prime is 243698089. The reversal of 243698051 is 150896342.

It is a happy number.

It is an a-pointer prime, because the next prime (243698089) can be obtained adding 243698051 to its sum of digits (38).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243698051 is a prime.

It is a super-2 number, since 2×243698051² = 118777480122397202, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 243697996 and 243698014.

It is not a weakly prime, because it can be changed into another prime (243698951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121849025 + 121849026.

It is an arithmetic number, because the mean of its divisors is an integer number (121849026).

Almost surely, 2^243698051 is an apocalyptic number.

243698051 is a deficient number, since it is larger than the sum of its proper divisors (1).

243698051 is an equidigital number, since it uses as much as digits as its factorization.

243698051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 243698051 is about 15610.8312078505. The cubic root of 243698051 is about 624.6221084161.

The spelling of 243698051 in words is "two hundred forty-three million, six hundred ninety-eight thousand, fifty-one".