64473457 has 2 divisors, whose sum is σ = 64473458. Its totient is φ = 64473456.

The previous prime is 64473419. The next prime is 64473491. The reversal of 64473457 is 75437446.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45104656 + 19368801 = 6716^2 + 4401^2 .

It is a cyclic number.

It is not a de Polignac number, because 64473457 - 2⁷ = 64473329 is a prime.

It is not a weakly prime, because it can be changed into another prime (64473407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32236728 + 32236729.

It is an arithmetic number, because the mean of its divisors is an integer number (32236729).

Almost surely, 2^64473457 is an apocalyptic number.

It is an amenable number.

64473457 is a deficient number, since it is larger than the sum of its proper divisors (1).

64473457 is an equidigital number, since it uses as much as digits as its factorization.

64473457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 282240, while the sum is 40.

The square root of 64473457 is about 8029.5365370612. The cubic root of 64473457 is about 400.9839463892.

The spelling of 64473457 in words is "sixty-four million, four hundred seventy-three thousand, four hundred fifty-seven".