1137998 has 4 divisors (see below), whose sum is σ = 1707000. Its totient is φ = 568998.

The previous prime is 1137991. The next prime is 1138019. The reversal of 1137998 is 8997311.

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

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1137991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 284498 + ... + 284501.

It is an arithmetic number, because the mean of its divisors is an integer number (426750).

2^1137998 is an apocalyptic number.

1137998 is a deficient number, since it is larger than the sum of its proper divisors (569002).

1137998 is an equidigital number, since it uses as much as digits as its factorization.

1137998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 569001.

The product of its digits is 13608, while the sum is 38.

The square root of 1137998 is about 1066.7698908387. The cubic root of 1137998 is about 104.4032054721.

The spelling of 1137998 in words is "one million, one hundred thirty-seven thousand, nine hundred ninety-eight".