102487681 has 4 divisors (see below), whose sum is σ = 102877632. Its totient is φ = 102097732.

The previous prime is 102487673. The next prime is 102487687. The reversal of 102487681 is 186784201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 186784201 = 347 ⋅538283.

It is a cyclic number.

It is not a de Polignac number, because 102487681 - 2³ = 102487673 is a prime.

It is a super-2 number, since 2×102487681² = 21007449513515522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 102487681.

It is not an unprimeable number, because it can be changed into a prime (102487687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 194581 + ... + 195106.

It is an arithmetic number, because the mean of its divisors is an integer number (25719408).

Almost surely, 2^102487681 is an apocalyptic number.

It is an amenable number.

102487681 is a deficient number, since it is larger than the sum of its proper divisors (389951).

102487681 is an equidigital number, since it uses as much as digits as its factorization.

102487681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389950.

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 102487681 is about 10123.6199553322. The cubic root of 102487681 is about 467.9763316859.

The spelling of 102487681 in words is "one hundred two million, four hundred eighty-seven thousand, six hundred eighty-one".