67990307 has 16 divisors (see below), whose sum is σ = 85650432. Its totient is φ = 52427520.

The previous prime is 67990249. The next prime is 67990309. The reversal of 67990307 is 70309976.

It is a cyclic number.

It is not a de Polignac number, because 67990307 - 2¹⁰ = 67989283 is a prime.

It is not an unprimeable number, because it can be changed into a prime (67990309) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2918 + ... + 12020.

It is an arithmetic number, because the mean of its divisors is an integer number (5353152).

Almost surely, 2^67990307 is an apocalyptic number.

67990307 is a deficient number, since it is larger than the sum of its proper divisors (17660125).

67990307 is a wasteful number, since it uses less digits than its factorization.

67990307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9218.

The product of its (nonzero) digits is 71442, while the sum is 41.

The square root of 67990307 is about 8245.6235058363. The cubic root of 67990307 is about 408.1461154060.

The spelling of 67990307 in words is "sixty-seven million, nine hundred ninety thousand, three hundred seven".