102197239 has 4 divisors (see below), whose sum is σ = 102447520. Its totient is φ = 101946960.

The previous prime is 102197237. The next prime is 102197267. The reversal of 102197239 is 932791201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 932791201 = 37 ⋅25210573.

It is a cyclic number.

It is not a de Polignac number, because 102197239 - 2¹ = 102197237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102197233) 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, 124527 + ... + 125344.

It is an arithmetic number, because the mean of its divisors is an integer number (25611880).

Almost surely, 2^102197239 is an apocalyptic number.

102197239 is a deficient number, since it is larger than the sum of its proper divisors (250281).

102197239 is an equidigital number, since it uses as much as digits as its factorization.

102197239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250280.

The product of its (nonzero) digits is 6804, while the sum is 34.

The square root of 102197239 is about 10109.2650079024. The cubic root of 102197239 is about 467.5338440996.

The spelling of 102197239 in words is "one hundred two million, one hundred ninety-seven thousand, two hundred thirty-nine".