651464189 has 2 divisors, whose sum is σ = 651464190. Its totient is φ = 651464188.

The previous prime is 651464183. The next prime is 651464279. The reversal of 651464189 is 981464156.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 334268089 + 317196100 = 18283^2 + 17810^2 .

It is a cyclic number.

It is not a de Polignac number, because 651464189 - 2⁴ = 651464173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (651464183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325732094 + 325732095.

It is an arithmetic number, because the mean of its divisors is an integer number (325732095).

Almost surely, 2^651464189 is an apocalyptic number.

It is an amenable number.

651464189 is a deficient number, since it is larger than the sum of its proper divisors (1).

651464189 is an equidigital number, since it uses as much as digits as its factorization.

651464189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 207360, while the sum is 44.

The square root of 651464189 is about 25523.7965240283. The cubic root of 651464189 is about 866.8890471909.

The spelling of 651464189 in words is "six hundred fifty-one million, four hundred sixty-four thousand, one hundred eighty-nine".