64434157 has 2 divisors, whose sum is σ = 64434158. Its totient is φ = 64434156.

The previous prime is 64434121. The next prime is 64434163. The reversal of 64434157 is 75143446.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62504836 + 1929321 = 7906^2 + 1389^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64434157 is a prime.

It is equal to p_3809266 and since 64434157 and 3809266 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64434197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32217078 + 32217079.

It is an arithmetic number, because the mean of its divisors is an integer number (32217079).

Almost surely, 2^64434157 is an apocalyptic number.

It is an amenable number.

64434157 is a deficient number, since it is larger than the sum of its proper divisors (1).

64434157 is an equidigital number, since it uses as much as digits as its factorization.

64434157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 34.

The square root of 64434157 is about 8027.0889493016. The cubic root of 64434157 is about 400.9024561510.

The spelling of 64434157 in words is "sixty-four million, four hundred thirty-four thousand, one hundred fifty-seven".