353723989 has 2 divisors, whose sum is σ = 353723990. Its totient is φ = 353723988.

The previous prime is 353723963. The next prime is 353724011. The reversal of 353723989 is 989327353.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 261371889 + 92352100 = 16167^2 + 9610^2 .

It is a cyclic number.

It is not a de Polignac number, because 353723989 - 2⁹ = 353723477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (353729989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 176861994 + 176861995.

It is an arithmetic number, because the mean of its divisors is an integer number (176861995).

Almost surely, 2^353723989 is an apocalyptic number.

It is an amenable number.

353723989 is a deficient number, since it is larger than the sum of its proper divisors (1).

353723989 is an equidigital number, since it uses as much as digits as its factorization.

353723989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1224720, while the sum is 49.

The square root of 353723989 is about 18807.5513823570. The cubic root of 353723989 is about 707.2204951697.

The spelling of 353723989 in words is "three hundred fifty-three million, seven hundred twenty-three thousand, nine hundred eighty-nine".