67650397 has 4 divisors (see below), whose sum is σ = 67670460. Its totient is φ = 67630336.

The previous prime is 67650377. The next prime is 67650491. The reversal of 67650397 is 79305676.

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

It can be written as a sum of positive squares in 2 ways, for example, as 53670276 + 13980121 = 7326^2 + 3739^2 .

It is a cyclic number.

It is not a de Polignac number, because 67650397 - 2¹¹ = 67648349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67650377) 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, 3598 + ... + 12175.

It is an arithmetic number, because the mean of its divisors is an integer number (16917615).

Almost surely, 2^67650397 is an apocalyptic number.

It is an amenable number.

67650397 is a deficient number, since it is larger than the sum of its proper divisors (20063).

67650397 is a wasteful number, since it uses less digits than its factorization.

67650397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20062.

The product of its (nonzero) digits is 238140, while the sum is 43.

The square root of 67650397 is about 8224.9861398060. The cubic root of 67650397 is about 407.4648183711.

The spelling of 67650397 in words is "sixty-seven million, six hundred fifty thousand, three hundred ninety-seven".