651604747 has 4 divisors (see below), whose sum is σ = 689934456. Its totient is φ = 613275040.

The previous prime is 651604729. The next prime is 651604763. The reversal of 651604747 is 747406156.

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

It is a cyclic number.

It is not a de Polignac number, because 651604747 - 2²⁷ = 517387019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (651604787) 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, 19164829 + ... + 19164862.

It is an arithmetic number, because the mean of its divisors is an integer number (172483614).

Almost surely, 2^651604747 is an apocalyptic number.

651604747 is a deficient number, since it is larger than the sum of its proper divisors (38329709).

651604747 is a wasteful number, since it uses less digits than its factorization.

651604747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38329708.

The product of its (nonzero) digits is 141120, while the sum is 40.

The square root of 651604747 is about 25526.5498452102. The cubic root of 651604747 is about 866.9513885192.

The spelling of 651604747 in words is "six hundred fifty-one million, six hundred four thousand, seven hundred forty-seven".