1097631 has 12 divisors (see below), whose sum is σ = 1644552. Its totient is φ = 731592.

The previous prime is 1097627. The next prime is 1097633. The reversal of 1097631 is 1367901.

It is not a de Polignac number, because 1097631 - 2² = 1097627 is a prime.

It is a super-2 number, since 2×1097631² = 2409587624322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 1097595 and 1097604.

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 polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2016 + ... + 2501.

It is an arithmetic number, because the mean of its divisors is an integer number (137046).

2^1097631 is an apocalyptic number.

1097631 is a deficient number, since it is larger than the sum of its proper divisors (546921).

1097631 is an frugal number, since it uses more digits than its factorization.

1097631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4532 (or 4520 counting only the distinct ones).

The product of its (nonzero) digits is 1134, while the sum is 27.

The square root of 1097631 is about 1047.6788630110. The cubic root of 1097631 is about 103.1538530835.

It can be divided in two parts, 1097 and 631, that added together give a cube (1728 = 12³).

The spelling of 1097631 in words is "one million, ninety-seven thousand, six hundred thirty-one".