1025231997 has 4 divisors (see below), whose sum is σ = 1366976000. Its totient is φ = 683487996.

The previous prime is 1025231981. The next prime is 1025232067. The reversal of 1025231997 is 7991325201.

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 1025231997 - 2⁴ = 1025231981 is a prime.

It is a super-2 number, since 2×1025231997² = 2102201295345216018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1025231297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170871997 + ... + 170872002.

It is an arithmetic number, because the mean of its divisors is an integer number (341744000).

Almost surely, 2^1025231997 is an apocalyptic number.

It is an amenable number.

1025231997 is a deficient number, since it is larger than the sum of its proper divisors (341744003).

1025231997 is an equidigital number, since it uses as much as digits as its factorization.

1025231997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341744002.

The product of its (nonzero) digits is 34020, while the sum is 39.

The square root of 1025231997 is about 32019.2441665946. The cubic root of 1025231997 is about 1008.3409015999.

The spelling of 1025231997 in words is "one billion, twenty-five million, two hundred thirty-one thousand, nine hundred ninety-seven".