68764397 has 4 divisors (see below), whose sum is σ = 74053980. Its totient is φ = 63474816.

The previous prime is 68764391. The next prime is 68764403. The reversal of 68764397 is 79346786.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (68764391) and next prime (68764403).

It can be written as a sum of positive squares in 2 ways, for example, as 11095561 + 57668836 = 3331^2 + 7594^2 .

It is a cyclic number.

It is not a de Polignac number, because 68764397 - 2¹⁸ = 68502253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68764391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2644772 + ... + 2644797.

It is an arithmetic number, because the mean of its divisors is an integer number (18513495).

Almost surely, 2^68764397 is an apocalyptic number.

It is an amenable number.

68764397 is a deficient number, since it is larger than the sum of its proper divisors (5289583).

68764397 is a wasteful number, since it uses less digits than its factorization.

68764397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5289582.

The product of its digits is 1524096, while the sum is 50.

The square root of 68764397 is about 8292.4301022077. The cubic root of 68764397 is about 409.6892291065.

The spelling of 68764397 in words is "sixty-eight million, seven hundred sixty-four thousand, three hundred ninety-seven".