267987397 has 4 divisors (see below), whose sum is σ = 268734240. Its totient is φ = 267240556.

The previous prime is 267987383. The next prime is 267987403. The reversal of 267987397 is 793789762.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 793789762 = 2 ⋅396894881.

It is a cyclic number.

It is not a de Polignac number, because 267987397 - 2¹¹ = 267985349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (267987367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 372883 + ... + 373600.

It is an arithmetic number, because the mean of its divisors is an integer number (67183560).

Almost surely, 2^267987397 is an apocalyptic number.

It is an amenable number.

267987397 is a deficient number, since it is larger than the sum of its proper divisors (746843).

267987397 is an equidigital number, since it uses as much as digits as its factorization.

267987397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 746842.

The product of its digits is 8001504, while the sum is 58.

The square root of 267987397 is about 16370.3206138426. The cubic root of 267987397 is about 644.7204661760.

The spelling of 267987397 in words is "two hundred sixty-seven million, nine hundred eighty-seven thousand, three hundred ninety-seven".