64087471997 has 2 divisors, whose sum is σ = 64087471998. Its totient is φ = 64087471996.

The previous prime is 64087471963. The next prime is 64087472003. The reversal of 64087471997 is 79917478046.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56927096836 + 7160375161 = 238594^2 + 84619^2 .

It is a cyclic number.

It is not a de Polignac number, because 64087471997 - 2¹⁸ = 64087209853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64087471927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32043735998 + 32043735999.

It is an arithmetic number, because the mean of its divisors is an integer number (32043735999).

Almost surely, 2^64087471997 is an apocalyptic number.

It is an amenable number.

64087471997 is a deficient number, since it is larger than the sum of its proper divisors (1).

64087471997 is an equidigital number, since it uses as much as digits as its factorization.

64087471997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21337344, while the sum is 62.

The spelling of 64087471997 in words is "sixty-four billion, eighty-seven million, four hundred seventy-one thousand, nine hundred ninety-seven".