67090745 has 4 divisors (see below), whose sum is σ = 80508900. Its totient is φ = 53672592.

The previous prime is 67090711. The next prime is 67090759. The reversal of 67090745 is 54709076.

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 8231161 + 58859584 = 2869^2 + 7672^2 .

It is a cyclic number.

It is not a de Polignac number, because 67090745 - 2⁸ = 67090489 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 67090699 and 67090708.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6709070 + ... + 6709079.

It is an arithmetic number, because the mean of its divisors is an integer number (20127225).

Almost surely, 2^67090745 is an apocalyptic number.

It is an amenable number.

67090745 is a deficient number, since it is larger than the sum of its proper divisors (13418155).

67090745 is a wasteful number, since it uses less digits than its factorization.

67090745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13418154.

The product of its (nonzero) digits is 52920, while the sum is 38.

The square root of 67090745 is about 8190.8940293475. The cubic root of 67090745 is about 406.3380930855.

The spelling of 67090745 in words is "sixty-seven million, ninety thousand, seven hundred forty-five".