1139997 has 4 divisors (see below), whose sum is σ = 1520000. Its totient is φ = 759996.

The previous prime is 1139993. The next prime is 1140091. The reversal of 1139997 is 7999311.

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.

It is not a de Polignac number, because 1139997 - 2² = 1139993 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1139993) 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, 189997 + ... + 190002.

It is an arithmetic number, because the mean of its divisors is an integer number (380000).

2^1139997 is an apocalyptic number.

It is an amenable number.

1139997 is a deficient number, since it is larger than the sum of its proper divisors (380003).

1139997 is an equidigital number, since it uses as much as digits as its factorization.

1139997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380002.

The product of its digits is 15309, while the sum is 39.

The square root of 1139997 is about 1067.7064203235. The cubic root of 1139997 is about 104.4643010467.

The spelling of 1139997 in words is "one million, one hundred thirty-nine thousand, nine hundred ninety-seven".