1993232641 has 4 divisors (see below), whose sum is σ = 1993580884. Its totient is φ = 1992884400.

The previous prime is 1993232627. The next prime is 1993232653. The reversal of 1993232641 is 1462323991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1462323991 = 499 ⋅2930509.

It can be written as a sum of positive squares in 2 ways, for example, as 1907855041 + 85377600 = 43679^2 + 9240^2 .

It is a cyclic number.

It is not a de Polignac number, because 1993232641 - 2²³ = 1984844033 is a prime.

It is a super-2 number, since 2×1993232641² = 7945952722295669762, 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 = 1993232594 and 1993232603.

It is not an unprimeable number, because it can be changed into a prime (1993232741) 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, 165390 + ... + 177031.

It is an arithmetic number, because the mean of its divisors is an integer number (498395221).

Almost surely, 2^1993232641 is an apocalyptic number.

It is an amenable number.

1993232641 is a deficient number, since it is larger than the sum of its proper divisors (348243).

1993232641 is an equidigital number, since it uses as much as digits as its factorization.

1993232641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348242.

The product of its digits is 69984, while the sum is 40.

The square root of 1993232641 is about 44645.6340642621. The cubic root of 1993232641 is about 1258.4983877326.

The spelling of 1993232641 in words is "one billion, nine hundred ninety-three million, two hundred thirty-two thousand, six hundred forty-one".