102447137 has 4 divisors (see below), whose sum is σ = 110327700. Its totient is φ = 94566576.

The previous prime is 102447133. The next prime is 102447161. The reversal of 102447137 is 731744201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 731744201 = 43 ⋅17017307.

It can be written as a sum of positive squares in 2 ways, for example, as 30129121 + 72318016 = 5489^2 + 8504^2 .

It is not a de Polignac number, because 102447137 - 2² = 102447133 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102447133) 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, 3940262 + ... + 3940287.

It is an arithmetic number, because the mean of its divisors is an integer number (27581925).

Almost surely, 2^102447137 is an apocalyptic number.

It is an amenable number.

102447137 is a deficient number, since it is larger than the sum of its proper divisors (7880563).

102447137 is an equidigital number, since it uses as much as digits as its factorization.

102447137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7880562.

The product of its (nonzero) digits is 4704, while the sum is 29.

The square root of 102447137 is about 10121.6173114774. The cubic root of 102447137 is about 467.9146132604.

The spelling of 102447137 in words is "one hundred two million, four hundred forty-seven thousand, one hundred thirty-seven".