353091961 has 2 divisors, whose sum is σ = 353091962. Its totient is φ = 353091960.

The previous prime is 353091923. The next prime is 353091967. The reversal of 353091961 is 169190353.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 331931961 + 21160000 = 18219^2 + 4600^2 .

It is an emirp because it is prime and its reverse (169190353) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 353091961 - 2⁷ = 353091833 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 353091961.

It is not a weakly prime, because it can be changed into another prime (353091967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 176545980 + 176545981.

It is an arithmetic number, because the mean of its divisors is an integer number (176545981).

Almost surely, 2^353091961 is an apocalyptic number.

It is an amenable number.

353091961 is a deficient number, since it is larger than the sum of its proper divisors (1).

353091961 is an equidigital number, since it uses as much as digits as its factorization.

353091961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21870, while the sum is 37.

The square root of 353091961 is about 18790.7413637674. The cubic root of 353091961 is about 706.7990275337.

The spelling of 353091961 in words is "three hundred fifty-three million, ninety-one thousand, nine hundred sixty-one".