1097639 has 4 divisors (see below), whose sum is σ = 1162224. Its totient is φ = 1033056.

The previous prime is 1097633. The next prime is 1097651. The reversal of 1097639 is 9367901.

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

It is a de Polignac number, because none of the positive numbers 2^k-1097639 is a prime.

It is a super-2 number, since 2×1097639² = 2409622748642, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1097599 and 1097608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1097633) 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, 32267 + ... + 32300.

It is an arithmetic number, because the mean of its divisors is an integer number (290556).

2^1097639 is an apocalyptic number.

1097639 is a deficient number, since it is larger than the sum of its proper divisors (64585).

1097639 is an equidigital number, since it uses as much as digits as its factorization.

1097639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64584.

The product of its (nonzero) digits is 10206, while the sum is 35.

The square root of 1097639 is about 1047.6826809679. The cubic root of 1097639 is about 103.1541036926.

The spelling of 1097639 in words is "one million, ninety-seven thousand, six hundred thirty-nine".