103640945 has 8 divisors (see below), whose sum is σ = 125767080. Its totient is φ = 81980800.

The previous prime is 103640941. The next prime is 103640987. The reversal of 103640945 is 549046301.

It can be written as a sum of positive squares in 4 ways, for example, as 1893376 + 101747569 = 1376^2 + 10087^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 103640945 - 2² = 103640941 is a prime.

It is a super-3 number, since 3×103640945³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (103640941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116006 + ... + 116895.

It is an arithmetic number, because the mean of its divisors is an integer number (15720885).

Almost surely, 2^103640945 is an apocalyptic number.

It is an amenable number.

103640945 is a deficient number, since it is larger than the sum of its proper divisors (22126135).

103640945 is an equidigital number, since it uses as much as digits as its factorization.

103640945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232995.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 103640945 is about 10180.4196868302. The cubic root of 103640945 is about 469.7251222035.

The spelling of 103640945 in words is "one hundred three million, six hundred forty thousand, nine hundred forty-five".