102543239 has 4 divisors (see below), whose sum is σ = 104281320. Its totient is φ = 100805160.

The previous prime is 102543227. The next prime is 102543251. The reversal of 102543239 is 932345201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 932345201 = 5431 ⋅171671.

It is an interprime number because it is at equal distance from previous prime (102543227) and next prime (102543251).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102543239 is a prime.

It is a super-2 number, since 2×102543239² = 21030231729222242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102543839) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 868952 + ... + 869069.

It is an arithmetic number, because the mean of its divisors is an integer number (26070330).

Almost surely, 2^102543239 is an apocalyptic number.

102543239 is a deficient number, since it is larger than the sum of its proper divisors (1738081).

102543239 is an equidigital number, since it uses as much as digits as its factorization.

102543239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1738080.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 102543239 is about 10126.3635625036. The cubic root of 102543239 is about 468.0608788629.

The spelling of 102543239 in words is "one hundred two million, five hundred forty-three thousand, two hundred thirty-nine".