6390403601 has 4 divisors (see below), whose sum is σ = 6393076452. Its totient is φ = 6387730752.

The previous prime is 6390403597. The next prime is 6390403631. The reversal of 6390403601 is 1063040936.

It is a happy number.

It is a Cunningham number, because it is equal to 79940²+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 132802576 + 6257601025 = 11524^2 + 79105^2 .

It is a cyclic number.

It is not a de Polignac number, because 6390403601 - 2² = 6390403597 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6390403631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1332836 + ... + 1337621.

It is an arithmetic number, because the mean of its divisors is an integer number (1598269113).

Almost surely, 2^6390403601 is an apocalyptic number.

It is an amenable number.

6390403601 is a deficient number, since it is larger than the sum of its proper divisors (2672851).

6390403601 is a wasteful number, since it uses less digits than its factorization.

6390403601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2672850.

The product of its (nonzero) digits is 11664, while the sum is 32.

The square root of 6390403601 is about 79940.0000062547. Note that the first 5 decimals coincide. The cubic root of 6390403601 is about 1855.7070996968.

The spelling of 6390403601 in words is "six billion, three hundred ninety million, four hundred three thousand, six hundred one".