353749993 has 2 divisors, whose sum is σ = 353749994. Its totient is φ = 353749992.

The previous prime is 353749973. The next prime is 353750039. The reversal of 353749993 is 399947353.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 203148009 + 150601984 = 14253^2 + 12272^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-353749993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 353749993.

It is not a weakly prime, because it can be changed into another prime (353749943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 176874996 + 176874997.

It is an arithmetic number, because the mean of its divisors is an integer number (176874997).

Almost surely, 2^353749993 is an apocalyptic number.

It is an amenable number.

353749993 is a deficient number, since it is larger than the sum of its proper divisors (1).

353749993 is an equidigital number, since it uses as much as digits as its factorization.

353749993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2755620, while the sum is 52.

The square root of 353749993 is about 18808.2426877154. The cubic root of 353749993 is about 707.2378251706.

The spelling of 353749993 in words is "three hundred fifty-three million, seven hundred forty-nine thousand, nine hundred ninety-three".