64978079 has 2 divisors, whose sum is σ = 64978080. Its totient is φ = 64978078.

The previous prime is 64978049. The next prime is 64978129. The reversal of 64978079 is 97087946.

It is a happy number.

It is an a-pointer prime, because the next prime (64978129) can be obtained adding 64978079 to its sum of digits (50).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64978079 - 2⁸ = 64977823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64978049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32489039 + 32489040.

It is an arithmetic number, because the mean of its divisors is an integer number (32489040).

Almost surely, 2^64978079 is an apocalyptic number.

64978079 is a deficient number, since it is larger than the sum of its proper divisors (1).

64978079 is an equidigital number, since it uses as much as digits as its factorization.

64978079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 762048, while the sum is 50.

The square root of 64978079 is about 8060.8981509507. The cubic root of 64978079 is about 402.0273716336.

The spelling of 64978079 in words is "sixty-four million, nine hundred seventy-eight thousand, seventy-nine".