354979661 has 2 divisors, whose sum is σ = 354979662. Its totient is φ = 354979660.

The previous prime is 354979643. The next prime is 354979687. The reversal of 354979661 is 166979453.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 229674025 + 125305636 = 15155^2 + 11194^2 .

It is an emirp because it is prime and its reverse (166979453) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-354979661 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (354979621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 177489830 + 177489831.

It is an arithmetic number, because the mean of its divisors is an integer number (177489831).

Almost surely, 2^354979661 is an apocalyptic number.

It is an amenable number.

354979661 is a deficient number, since it is larger than the sum of its proper divisors (1).

354979661 is an equidigital number, since it uses as much as digits as its factorization.

354979661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1224720, while the sum is 50.

The square root of 354979661 is about 18840.9039326673. The cubic root of 354979661 is about 708.0563523778.

The spelling of 354979661 in words is "three hundred fifty-four million, nine hundred seventy-nine thousand, six hundred sixty-one".