67072969 has 4 divisors (see below), whose sum is σ = 69385860. Its totient is φ = 64760080.

The previous prime is 67072961. The next prime is 67072979. The reversal of 67072969 is 96927076.

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 51667344 + 15405625 = 7188^2 + 3925^2 .

It is a cyclic number.

It is not a de Polignac number, because 67072969 - 2³ = 67072961 is a prime.

It is a super-2 number, since 2×67072969² = 8997566340949922, which contains 22 as substring.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67072961) by changing a digit.

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, 1156402 + ... + 1156459.

It is an arithmetic number, because the mean of its divisors is an integer number (17346465).

Almost surely, 2^67072969 is an apocalyptic number.

It is an amenable number.

67072969 is a deficient number, since it is larger than the sum of its proper divisors (2312891).

67072969 is a wasteful number, since it uses less digits than its factorization.

67072969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2312890.

The product of its (nonzero) digits is 285768, while the sum is 46.

The square root of 67072969 is about 8189.8088500282. The cubic root of 67072969 is about 406.3022028696.

The spelling of 67072969 in words is "sixty-seven million, seventy-two thousand, nine hundred sixty-nine".