650461621 has 4 divisors (see below), whose sum is σ = 658298592. Its totient is φ = 642624652.

The previous prime is 650461613. The next prime is 650461627. The reversal of 650461621 is 126164056.

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 650461621 - 2³ = 650461613 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 (650461627) 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, 3918361 + ... + 3918526.

It is an arithmetic number, because the mean of its divisors is an integer number (164574648).

Almost surely, 2^650461621 is an apocalyptic number.

It is an amenable number.

650461621 is a deficient number, since it is larger than the sum of its proper divisors (7836971).

650461621 is an equidigital number, since it uses as much as digits as its factorization.

650461621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7836970.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 650461621 is about 25504.1490938239. The cubic root of 650461621 is about 866.4441204884. Note that the first 3 decimals are identical.

The spelling of 650461621 in words is "six hundred fifty million, four hundred sixty-one thousand, six hundred twenty-one".