354656381 has 2 divisors, whose sum is σ = 354656382. Its totient is φ = 354656380.

The previous prime is 354656339. The next prime is 354656383. The reversal of 354656381 is 183656453.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 197655481 + 157000900 = 14059^2 + 12530^2 .

It is a cyclic number.

It is not a de Polignac number, because 354656381 - 2⁶ = 354656317 is a prime.

It is a super-2 number, since 2×354656381² = 251562297168034322, which contains 22 as substring.

Together with 354656383, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (354656383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 177328190 + 177328191.

It is an arithmetic number, because the mean of its divisors is an integer number (177328191).

Almost surely, 2^354656381 is an apocalyptic number.

It is an amenable number.

354656381 is a deficient number, since it is larger than the sum of its proper divisors (1).

354656381 is an equidigital number, since it uses as much as digits as its factorization.

354656381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 259200, while the sum is 41.

The square root of 354656381 is about 18832.3227722976. The cubic root of 354656381 is about 707.8413447736.

The spelling of 354656381 in words is "three hundred fifty-four million, six hundred fifty-six thousand, three hundred eighty-one".