647032901 has 4 divisors (see below), whose sum is σ = 651002592. Its totient is φ = 643063212.

The previous prime is 647032889. The next prime is 647032921. The reversal of 647032901 is 109230746.

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.

It is a cyclic number.

It is not a de Polignac number, because 647032901 - 2¹⁰ = 647031877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647032921) 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, 1984601 + ... + 1984926.

It is an arithmetic number, because the mean of its divisors is an integer number (162750648).

Almost surely, 2^647032901 is an apocalyptic number.

It is an amenable number.

647032901 is a deficient number, since it is larger than the sum of its proper divisors (3969691).

647032901 is a wasteful number, since it uses less digits than its factorization.

647032901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3969690.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 647032901 is about 25436.8414116218. The cubic root of 647032901 is about 864.9190345993.

The spelling of 647032901 in words is "six hundred forty-seven million, thirty-two thousand, nine hundred one".