2391667 has 4 divisors (see below), whose sum is σ = 2410056. Its totient is φ = 2373280.

The previous prime is 2391637. The next prime is 2391671. The reversal of 2391667 is 7661932.

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

It is a cyclic number.

It is not a de Polignac number, because 2391667 - 2⁷ = 2391539 is a prime.

It is a Duffinian number.

It is a plaindrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (2391637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8998 + ... + 9259.

It is an arithmetic number, because the mean of its divisors is an integer number (602514).

2^2391667 is an apocalyptic number.

2391667 is a deficient number, since it is larger than the sum of its proper divisors (18389).

2391667 is a wasteful number, since it uses less digits than its factorization.

2391667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18388.

The product of its digits is 13608, while the sum is 34.

The square root of 2391667 is about 1546.5015357251. The cubic root of 2391667 is about 133.7314551981.

The spelling of 2391667 in words is "two million, three hundred ninety-one thousand, six hundred sixty-seven".