402010243 has 2 divisors, whose sum is σ = 402010244. Its totient is φ = 402010242.

The previous prime is 402010183. The next prime is 402010253. The reversal of 402010243 is 342010204.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 402010243 - 2⁹ = 402009731 is a prime.

It is a super-3 number, since 3×402010243³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (402010253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201005121 + 201005122.

It is an arithmetic number, because the mean of its divisors is an integer number (201005122).

Almost surely, 2^402010243 is an apocalyptic number.

402010243 is a deficient number, since it is larger than the sum of its proper divisors (1).

402010243 is an equidigital number, since it uses as much as digits as its factorization.

402010243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 402010243 is about 20050.1930913395. The cubic root of 402010243 is about 738.0385375351.

Adding to 402010243 its reverse (342010204), we get a palindrome (744020447).

The spelling of 402010243 in words is "four hundred two million, ten thousand, two hundred forty-three".