64299997 has 2 divisors, whose sum is σ = 64299998. Its totient is φ = 64299996.

The previous prime is 64299979. The next prime is 64300021. The reversal of 64299997 is 79999246.

Together with previous prime (64299979) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61293241 + 3006756 = 7829^2 + 1734^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64299997 is a prime.

It is a super-2 number, since 2×64299997² = 8268979228400018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64299947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32149998 + 32149999.

It is an arithmetic number, because the mean of its divisors is an integer number (32149999).

Almost surely, 2^64299997 is an apocalyptic number.

It is an amenable number.

64299997 is a deficient number, since it is larger than the sum of its proper divisors (1).

64299997 is an equidigital number, since it uses as much as digits as its factorization.

64299997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2204496, while the sum is 55.

The square root of 64299997 is about 8018.7278916297. The cubic root of 64299997 is about 400.6240197422.

The spelling of 64299997 in words is "sixty-four million, two hundred ninety-nine thousand, nine hundred ninety-seven".