103072661 has 4 divisors (see below), whose sum is σ = 103117824. Its totient is φ = 103027500.

The previous prime is 103072633. The next prime is 103072667. The reversal of 103072661 is 166270301.

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.

It is a cyclic number.

It is not a de Polignac number, because 103072661 - 2¹⁴ = 103056277 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 103072661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103072667) 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, 18965 + ... + 23786.

It is an arithmetic number, because the mean of its divisors is an integer number (25779456).

Almost surely, 2^103072661 is an apocalyptic number.

It is an amenable number.

103072661 is a deficient number, since it is larger than the sum of its proper divisors (45163).

103072661 is an equidigital number, since it uses as much as digits as its factorization.

103072661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45162.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 103072661 is about 10152.4706845181. The cubic root of 103072661 is about 468.8650160195.

The spelling of 103072661 in words is "one hundred three million, seventy-two thousand, six hundred sixty-one".