3650997491 has 4 divisors (see below), whose sum is σ = 3677263800. Its totient is φ = 3624731184.

The previous prime is 3650997487. The next prime is 3650997509. The reversal of 3650997491 is 1947990563.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1947990563 = 6469 ⋅301127.

It is a cyclic number.

It is not a de Polignac number, because 3650997491 - 2² = 3650997487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3650994491) 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, 13132946 + ... + 13133223.

It is an arithmetic number, because the mean of its divisors is an integer number (919315950).

Almost surely, 2^3650997491 is an apocalyptic number.

3650997491 is a deficient number, since it is larger than the sum of its proper divisors (26266309).

3650997491 is a wasteful number, since it uses less digits than its factorization.

3650997491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26266308.

The product of its (nonzero) digits is 1837080, while the sum is 53.

The square root of 3650997491 is about 60423.4845982917. The cubic root of 3650997491 is about 1539.8219689344.

The spelling of 3650997491 in words is "three billion, six hundred fifty million, nine hundred ninety-seven thousand, four hundred ninety-one".