65449399 has 2 divisors, whose sum is σ = 65449400. Its totient is φ = 65449398.

The previous prime is 65449387. The next prime is 65449429. The reversal of 65449399 is 99394456.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65449399 - 2⁷ = 65449271 is a prime.

It is a super-2 number, since 2×65449399² = 8567247658922402, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65449379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32724699 + 32724700.

It is an arithmetic number, because the mean of its divisors is an integer number (32724700).

Almost surely, 2^65449399 is an apocalyptic number.

65449399 is a deficient number, since it is larger than the sum of its proper divisors (1).

65449399 is an equidigital number, since it uses as much as digits as its factorization.

65449399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1049760, while the sum is 49.

The square root of 65449399 is about 8090.0802839032. The cubic root of 65449399 is about 402.9970691066.

The spelling of 65449399 in words is "sixty-five million, four hundred forty-nine thousand, three hundred ninety-nine".