997962143 has 12 divisors (see below), whose sum is σ = 1017335592. Its totient is φ = 978842160.

The previous prime is 997962127. The next prime is 997962151. The reversal of 997962143 is 341269799.

It is not a de Polignac number, because 997962143 - 2⁴ = 997962127 is a prime.

It is a super-2 number, since 2×997962143² = 1991856877722304898, 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 = 997962091 and 997962100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997962193) 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, 4396196 + ... + 4396422.

It is an arithmetic number, because the mean of its divisors is an integer number (84777966).

Almost surely, 2^997962143 is an apocalyptic number.

997962143 is a deficient number, since it is larger than the sum of its proper divisors (19373449).

997962143 is a wasteful number, since it uses less digits than its factorization.

With its successor (997962144) it forms a Ruth-Aaron pair, since the sum of their prime factors is the same (742).

997962143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 742 (or 515 counting only the distinct ones).

The product of its digits is 734832, while the sum is 50.

The square root of 997962143 is about 31590.5388209825. The cubic root of 997962143 is about 999.3202523812.

The spelling of 997962143 in words is "nine hundred ninety-seven million, nine hundred sixty-two thousand, one hundred forty-three".