102279493 has 4 divisors (see below), whose sum is σ = 103956268. Its totient is φ = 100602720.

The previous prime is 102279487. The next prime is 102279523. The reversal of 102279493 is 394972201.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3038049 + 99241444 = 1743^2 + 9962^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102279493 is a prime.

It is a super-2 number, since 2×102279493² = 20922189376674098, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102279193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 838296 + ... + 838417.

It is an arithmetic number, because the mean of its divisors is an integer number (25989067).

Almost surely, 2^102279493 is an apocalyptic number.

It is an amenable number.

102279493 is a deficient number, since it is larger than the sum of its proper divisors (1676775).

102279493 is an equidigital number, since it uses as much as digits as its factorization.

102279493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1676774.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 102279493 is about 10113.3324379257. The cubic root of 102279493 is about 467.6592428432.

The spelling of 102279493 in words is "one hundred two million, two hundred seventy-nine thousand, four hundred ninety-three".