64233977 has 2 divisors, whose sum is σ = 64233978. Its totient is φ = 64233976.

The previous prime is 64233947. The next prime is 64233979. The reversal of 64233977 is 77933246.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41011216 + 23222761 = 6404^2 + 4819^2 .

It is a cyclic number.

It is not a de Polignac number, because 64233977 - 2¹² = 64229881 is a prime.

Together with 64233979, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (64233979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32116988 + 32116989.

It is an arithmetic number, because the mean of its divisors is an integer number (32116989).

Almost surely, 2^64233977 is an apocalyptic number.

It is an amenable number.

64233977 is a deficient number, since it is larger than the sum of its proper divisors (1).

64233977 is an equidigital number, since it uses as much as digits as its factorization.

64233977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 190512, while the sum is 41.

The square root of 64233977 is about 8014.6102213395. The cubic root of 64233977 is about 400.4868592631.

The spelling of 64233977 in words is "sixty-four million, two hundred thirty-three thousand, nine hundred seventy-seven".