102193906 has 4 divisors (see below), whose sum is σ = 153290862. Its totient is φ = 51096952.

The previous prime is 102193901. The next prime is 102193909. The reversal of 102193906 is 609391201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 102191881 + 2025 = 10109^2 + 45^2 .

It is not an unprimeable number, because it can be changed into a prime (102193901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25548475 + ... + 25548478.

Almost surely, 2^102193906 is an apocalyptic number.

102193906 is a deficient number, since it is larger than the sum of its proper divisors (51096956).

102193906 is an equidigital number, since it uses as much as digits as its factorization.

102193906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51096955.

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 102193906 is about 10109.1001577786. The cubic root of 102193906 is about 467.5287614208.

The spelling of 102193906 in words is "one hundred two million, one hundred ninety-three thousand, nine hundred six".