102724443 has 20 divisors (see below), whose sum is σ = 154271128. Its totient is φ = 68117760.

The previous prime is 102724439. The next prime is 102724471. The reversal of 102724443 is 344427201.

It is not a de Polignac number, because 102724443 - 2² = 102724439 is a prime.

It is a super-2 number, since 2×102724443² = 21104622379320498, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102724493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 12348 + ... + 18918.

Almost surely, 2^102724443 is an apocalyptic number.

102724443 is a deficient number, since it is larger than the sum of its proper divisors (51546685).

102724443 is an equidigital number, since it uses as much as digits as its factorization.

102724443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6776 (or 6767 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 27.

The square root of 102724443 is about 10135.3067541145. The cubic root of 102724443 is about 468.3364198438.

The spelling of 102724443 in words is "one hundred two million, seven hundred twenty-four thousand, four hundred forty-three".