3561949 has 4 divisors (see below), whose sum is σ = 3749440. Its totient is φ = 3374460.

The previous prime is 3561947. The next prime is 3561977. The reversal of 3561949 is 9491653.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9491653 = 163 ⋅58231.

It is a cyclic number.

It is not a de Polignac number, because 3561949 - 2¹ = 3561947 is a prime.

It is a Duffinian number.

3561949 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3561947) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93717 + ... + 93754.

It is an arithmetic number, because the mean of its divisors is an integer number (937360).

Almost surely, 2^3561949 is an apocalyptic number.

It is an amenable number.

3561949 is a deficient number, since it is larger than the sum of its proper divisors (187491).

3561949 is a wasteful number, since it uses less digits than its factorization.

3561949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187490.

The product of its digits is 29160, while the sum is 37.

The square root of 3561949 is about 1887.3126397076. The cubic root of 3561949 is about 152.7199942311.

The spelling of 3561949 in words is "three million, five hundred sixty-one thousand, nine hundred forty-nine".