102439047 has 8 divisors (see below), whose sum is σ = 138624256. Its totient is φ = 67273272.

The previous prime is 102439039. The next prime is 102439061. The reversal of 102439047 is 740934201.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 102439047 - 2³ = 102439039 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 (102439037) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 254623 + ... + 255024.

It is an arithmetic number, because the mean of its divisors is an integer number (17328032).

Almost surely, 2^102439047 is an apocalyptic number.

102439047 is a deficient number, since it is larger than the sum of its proper divisors (36185209).

102439047 is an equidigital number, since it uses as much as digits as its factorization.

102439047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 509717.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 102439047 is about 10121.2176638980. The cubic root of 102439047 is about 467.9022962450.

The spelling of 102439047 in words is "one hundred two million, four hundred thirty-nine thousand, forty-seven".