651423461 has 4 divisors (see below), whose sum is σ = 701532972. Its totient is φ = 601313952.

The previous prime is 651423439. The next prime is 651423467. The reversal of 651423461 is 164324156.

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 350400961 + 301022500 = 18719^2 + 17350^2 .

It is a cyclic number.

It is not a de Polignac number, because 651423461 - 2¹⁸ = 651161317 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 (651423467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25054736 + ... + 25054761.

It is an arithmetic number, because the mean of its divisors is an integer number (175383243).

Almost surely, 2^651423461 is an apocalyptic number.

It is an amenable number.

651423461 is a deficient number, since it is larger than the sum of its proper divisors (50109511).

651423461 is a wasteful number, since it uses less digits than its factorization.

651423461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50109510.

The product of its digits is 17280, while the sum is 32.

The square root of 651423461 is about 25522.9986678682. The cubic root of 651423461 is about 866.8709815303.

The spelling of 651423461 in words is "six hundred fifty-one million, four hundred twenty-three thousand, four hundred sixty-one".