64380897 has 12 divisors (see below), whose sum is σ = 106279680. Its totient is φ = 36789048.

The previous prime is 64380881. The next prime is 64380907. The reversal of 64380897 is 79808346.

It is a happy number.

It is not a de Polignac number, because 64380897 - 2⁴ = 64380881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64380857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 510897 + ... + 511022.

It is an arithmetic number, because the mean of its divisors is an integer number (8856640).

Almost surely, 2^64380897 is an apocalyptic number.

It is an amenable number.

64380897 is a deficient number, since it is larger than the sum of its proper divisors (41898783).

64380897 is a wasteful number, since it uses less digits than its factorization.

64380897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1021932 (or 1021929 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 64380897 is about 8023.7707469743. The cubic root of 64380897 is about 400.7919663550.

The spelling of 64380897 in words is "sixty-four million, three hundred eighty thousand, eight hundred ninety-seven".