64115893 has 2 divisors, whose sum is σ = 64115894. Its totient is φ = 64115892.

The previous prime is 64115879. The next prime is 64115903. The reversal of 64115893 is 39851146.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64112049 + 3844 = 8007^2 + 62^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64115893 is a prime.

It is a super-2 number, since 2×64115893² = 8221695470374898, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64115803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32057946 + 32057947.

It is an arithmetic number, because the mean of its divisors is an integer number (32057947).

Almost surely, 2^64115893 is an apocalyptic number.

It is an amenable number.

64115893 is a deficient number, since it is larger than the sum of its proper divisors (1).

64115893 is an equidigital number, since it uses as much as digits as its factorization.

64115893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 37.

The square root of 64115893 is about 8007.2400363671. The cubic root of 64115893 is about 400.2412981587.

The spelling of 64115893 in words is "sixty-four million, one hundred fifteen thousand, eight hundred ninety-three".