354811861 has 2 divisors, whose sum is σ = 354811862. Its totient is φ = 354811860.

The previous prime is 354811859. The next prime is 354811927. The reversal of 354811861 is 168118453.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 269156836 + 85655025 = 16406^2 + 9255^2 .

It is a cyclic number.

It is not a de Polignac number, because 354811861 - 2¹ = 354811859 is a prime.

Together with 354811859, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 354811861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (354811661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 177405930 + 177405931.

It is an arithmetic number, because the mean of its divisors is an integer number (177405931).

Almost surely, 2^354811861 is an apocalyptic number.

It is an amenable number.

354811861 is a deficient number, since it is larger than the sum of its proper divisors (1).

354811861 is an equidigital number, since it uses as much as digits as its factorization.

354811861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23040, while the sum is 37.

The square root of 354811861 is about 18836.4503290827. The cubic root of 354811861 is about 707.9447679737.

The spelling of 354811861 in words is "three hundred fifty-four million, eight hundred eleven thousand, eight hundred sixty-one".