651698473 has 2 divisors, whose sum is σ = 651698474. Its totient is φ = 651698472.

The previous prime is 651698471. The next prime is 651698503. The reversal of 651698473 is 374896156.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 524730649 + 126967824 = 22907^2 + 11268^2 .

It is a cyclic number.

It is not a de Polignac number, because 651698473 - 2¹ = 651698471 is a prime.

Together with 651698471, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (651698471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325849236 + 325849237.

It is an arithmetic number, because the mean of its divisors is an integer number (325849237).

Almost surely, 2^651698473 is an apocalyptic number.

It is an amenable number.

651698473 is a deficient number, since it is larger than the sum of its proper divisors (1).

651698473 is an equidigital number, since it uses as much as digits as its factorization.

651698473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1088640, while the sum is 49.

The square root of 651698473 is about 25528.3856324680. The cubic root of 651698473 is about 866.9929535889.

The spelling of 651698473 in words is "six hundred fifty-one million, six hundred ninety-eight thousand, four hundred seventy-three".