651653669 has 2 divisors, whose sum is σ = 651653670. Its totient is φ = 651653668.

The previous prime is 651653633. The next prime is 651653677. The reversal of 651653669 is 966356156.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 527620900 + 124032769 = 22970^2 + 11137^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-651653669 is a prime.

It is a super-2 number, since 2×651653669² = 849305008642323122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (651653689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325826834 + 325826835.

It is an arithmetic number, because the mean of its divisors is an integer number (325826835).

Almost surely, 2^651653669 is an apocalyptic number.

It is an amenable number.

651653669 is a deficient number, since it is larger than the sum of its proper divisors (1).

651653669 is an equidigital number, since it uses as much as digits as its factorization.

651653669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 874800, while the sum is 47.

The square root of 651653669 is about 25527.5080844175. The cubic root of 651653669 is about 866.9730846648.

The spelling of 651653669 in words is "six hundred fifty-one million, six hundred fifty-three thousand, six hundred sixty-nine".