1997031 has 4 divisors (see below), whose sum is σ = 2662712. Its totient is φ = 1331352.

The previous prime is 1997029. The next prime is 1997053. The reversal of 1997031 is 1307991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1307991 = 3 ⋅435997.

It is not a de Polignac number, because 1997031 - 2¹ = 1997029 is a prime.

It is a super-2 number, since 2×1997031² = 7976265629922, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 1997031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1997081) 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, 332836 + ... + 332841.

It is an arithmetic number, because the mean of its divisors is an integer number (665678).

2^1997031 is an apocalyptic number.

1997031 is a deficient number, since it is larger than the sum of its proper divisors (665681).

1997031 is an equidigital number, since it uses as much as digits as its factorization.

1997031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665680.

The product of its (nonzero) digits is 1701, while the sum is 30.

The square root of 1997031 is about 1413.1634724971. The cubic root of 1997031 is about 125.9297290203.

Subtracting from 1997031 its sum of digits (30), we obtain a triangular number (1997001 = T₁₉₉₈).

The spelling of 1997031 in words is "one million, nine hundred ninety-seven thousand, thirty-one".