103087661 has 4 divisors (see below), whose sum is σ = 105873852. Its totient is φ = 100301472.

The previous prime is 103087651. The next prime is 103087667. The reversal of 103087661 is 166780301.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 64722025 + 38365636 = 8045^2 + 6194^2 .

It is a cyclic number.

It is not a de Polignac number, because 103087661 - 2¹⁸ = 102825517 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 (103087667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1393040 + ... + 1393113.

It is an arithmetic number, because the mean of its divisors is an integer number (26468463).

Almost surely, 2^103087661 is an apocalyptic number.

It is an amenable number.

103087661 is a deficient number, since it is larger than the sum of its proper divisors (2786191).

103087661 is an equidigital number, since it uses as much as digits as its factorization.

103087661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2786190.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 103087661 is about 10153.2093940783. The cubic root of 103087661 is about 468.8877593089.

The spelling of 103087661 in words is "one hundred three million, eighty-seven thousand, six hundred sixty-one".