1320732667 has 4 divisors (see below), whose sum is σ = 1320867256. Its totient is φ = 1320598080.

The previous prime is 1320732653. The next prime is 1320732709. The reversal of 1320732667 is 7662370231.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1320732667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1320732067) 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, 51309 + ... + 72622.

It is an arithmetic number, because the mean of its divisors is an integer number (330216814).

Almost surely, 2^1320732667 is an apocalyptic number.

1320732667 is a deficient number, since it is larger than the sum of its proper divisors (134589).

1320732667 is a wasteful number, since it uses less digits than its factorization.

1320732667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134588.

The product of its (nonzero) digits is 63504, while the sum is 37.

The square root of 1320732667 is about 36341.8858481505. The cubic root of 1320732667 is about 1097.1642293499.

The spelling of 1320732667 in words is "one billion, three hundred twenty million, seven hundred thirty-two thousand, six hundred sixty-seven".