1745206906 has 4 divisors (see below), whose sum is σ = 2617810362. Its totient is φ = 872603452.

The previous prime is 1745206871. The next prime is 1745206913. The reversal of 1745206906 is 6096025471.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6096025471 = 887 ⋅6872633.

It can be written as a sum of positive squares in only one way, i.e., 1543311225 + 201895681 = 39285^2 + 14209^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 436301725 + ... + 436301728.

Almost surely, 2^1745206906 is an apocalyptic number.

1745206906 is a deficient number, since it is larger than the sum of its proper divisors (872603456).

1745206906 is an equidigital number, since it uses as much as digits as its factorization.

1745206906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 872603455.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 1745206906 is about 41775.6736151555. The cubic root of 1745206906 is about 1203.9699319761.

The spelling of 1745206906 in words is "one billion, seven hundred forty-five million, two hundred six thousand, nine hundred six".