65498921 has 2 divisors, whose sum is σ = 65498922. Its totient is φ = 65498920.

The previous prime is 65498897. The next prime is 65498941. The reversal of 65498921 is 12989456.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65286400 + 212521 = 8080^2 + 461^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65498921 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (65498941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32749460 + 32749461.

It is an arithmetic number, because the mean of its divisors is an integer number (32749461).

Almost surely, 2^65498921 is an apocalyptic number.

It is an amenable number.

65498921 is a deficient number, since it is larger than the sum of its proper divisors (1).

65498921 is an equidigital number, since it uses as much as digits as its factorization.

65498921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 44.

The square root of 65498921 is about 8093.1403670022. The cubic root of 65498921 is about 403.0986854686.

The spelling of 65498921 in words is "sixty-five million, four hundred ninety-eight thousand, nine hundred twenty-one".