102731289 has 16 divisors (see below), whose sum is σ = 145240128. Its totient is φ = 64366592.

The previous prime is 102731269. The next prime is 102731327. The reversal of 102731289 is 982137201.

It is a cyclic number.

It is not a de Polignac number, because 102731289 - 2²¹ = 100634137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (102731269) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59689 + ... + 61385.

It is an arithmetic number, because the mean of its divisors is an integer number (9077508).

Almost surely, 2^102731289 is an apocalyptic number.

It is an amenable number.

102731289 is a deficient number, since it is larger than the sum of its proper divisors (42508839).

102731289 is a wasteful number, since it uses less digits than its factorization.

102731289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2904.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 102731289 is about 10135.6444787690. The cubic root of 102731289 is about 468.3468235991.

The spelling of 102731289 in words is "one hundred two million, seven hundred thirty-one thousand, two hundred eighty-nine".