344781993 has 16 divisors (see below), whose sum is σ = 466796736. Its totient is φ = 226321920.

The previous prime is 344781979. The next prime is 344782019. The reversal of 344781993 is 399187443.

It is a happy number.

It is not a de Polignac number, because 344781993 - 2¹⁴ = 344765609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (344781973) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 192046 + ... + 193832.

It is an arithmetic number, because the mean of its divisors is an integer number (29174796).

Almost surely, 2^344781993 is an apocalyptic number.

It is an amenable number.

344781993 is a deficient number, since it is larger than the sum of its proper divisors (122014743).

344781993 is a wasteful number, since it uses less digits than its factorization.

344781993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2744.

The product of its digits is 653184, while the sum is 48.

The square root of 344781993 is about 18568.3061424568. The cubic root of 344781993 is about 701.2101468513.

The spelling of 344781993 in words is "three hundred forty-four million, seven hundred eighty-one thousand, nine hundred ninety-three".