3500947 has 4 divisors (see below), whose sum is σ = 3505000. Its totient is φ = 3496896.

The previous prime is 3500941. The next prime is 3500953. The reversal of 3500947 is 7490053.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 7490053 = 151 ⋅49603.

It is an interprime number because it is at equal distance from previous prime (3500941) and next prime (3500953).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3500947 is a prime.

It is an Ulam number.

It is a Duffinian number.

3500947 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3500941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153 + ... + 2650.

It is an arithmetic number, because the mean of its divisors is an integer number (876250).

Almost surely, 2^3500947 is an apocalyptic number.

3500947 is a deficient number, since it is larger than the sum of its proper divisors (4053).

3500947 is a wasteful number, since it uses less digits than its factorization.

3500947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4052.

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 3500947 is about 1871.0817726652. The cubic root of 3500947 is about 151.8431409292.

The spelling of 3500947 in words is "three million, five hundred thousand, nine hundred forty-seven".