103909657 has 4 divisors (see below), whose sum is σ = 105613156. Its totient is φ = 102206160.

The previous prime is 103909649. The next prime is 103909681. The reversal of 103909657 is 756909301.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 756909301 = 12041 ⋅62861.

It can be written as a sum of positive squares in 2 ways, for example, as 22477081 + 81432576 = 4741^2 + 9024^2 .

It is a cyclic number.

It is not a de Polignac number, because 103909657 - 2³ = 103909649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (103906657) 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, 851658 + ... + 851779.

It is an arithmetic number, because the mean of its divisors is an integer number (26403289).

Almost surely, 2^103909657 is an apocalyptic number.

It is an amenable number.

103909657 is a deficient number, since it is larger than the sum of its proper divisors (1703499).

103909657 is an equidigital number, since it uses as much as digits as its factorization.

103909657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1703498.

The product of its (nonzero) digits is 51030, while the sum is 40.

The square root of 103909657 is about 10193.6086348260. The cubic root of 103909657 is about 470.1307271789.

The spelling of 103909657 in words is "one hundred three million, nine hundred nine thousand, six hundred fifty-seven".