65649469 has 2 divisors, whose sum is σ = 65649470. Its totient is φ = 65649468.

The previous prime is 65649449. The next prime is 65649509. The reversal of 65649469 is 96494656.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58706244 + 6943225 = 7662^2 + 2635^2 .

It is a cyclic number.

It is not a de Polignac number, because 65649469 - 2⁷ = 65649341 is a prime.

It is a super-2 number, since 2×65649469² = 8619705559963922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65649449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32824734 + 32824735.

It is an arithmetic number, because the mean of its divisors is an integer number (32824735).

Almost surely, 2^65649469 is an apocalyptic number.

It is an amenable number.

65649469 is a deficient number, since it is larger than the sum of its proper divisors (1).

65649469 is an equidigital number, since it uses as much as digits as its factorization.

65649469 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1399680, while the sum is 49.

The square root of 65649469 is about 8102.4359917250. The cubic root of 65649469 is about 403.4072873218.

The spelling of 65649469 in words is "sixty-five million, six hundred forty-nine thousand, four hundred sixty-nine".