103440409 has 2 divisors, whose sum is σ = 103440410. Its totient is φ = 103440408.

The previous prime is 103440377. The next prime is 103440433. The reversal of 103440409 is 904044301.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82537225 + 20903184 = 9085^2 + 4572^2 .

It is a cyclic number.

It is not a de Polignac number, because 103440409 - 2⁵ = 103440377 is a prime.

It is not a weakly prime, because it can be changed into another prime (103440439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51720204 + 51720205.

It is an arithmetic number, because the mean of its divisors is an integer number (51720205).

Almost surely, 2^103440409 is an apocalyptic number.

It is an amenable number.

103440409 is a deficient number, since it is larger than the sum of its proper divisors (1).

103440409 is an equidigital number, since it uses as much as digits as its factorization.

103440409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 103440409 is about 10170.5658151354. The cubic root of 103440409 is about 469.4219678320.

The spelling of 103440409 in words is "one hundred three million, four hundred forty thousand, four hundred nine".