356981 has 2 divisors, whose sum is σ = 356982. Its totient is φ = 356980.

The previous prime is 356977. The next prime is 356989. The reversal of 356981 is 189653.

356981 is nontrivially palindromic in base 2, base 14 and base 16.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 286225 + 70756 = 535^2 + 266^2 .

It is an emirp because it is prime and its reverse (189653) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 356981 - 2² = 356977 is a prime.

It is a super-2 number, since 2×356981² = 254870868722, which contains 22 as substring.

It is a nialpdrome in base 13.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 356981.

It is not a weakly prime, because it can be changed into another prime (356989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 178490 + 178491.

It is an arithmetic number, because the mean of its divisors is an integer number (178491).

2³⁵⁶⁹⁸¹ is an apocalyptic number.

It is an amenable number.

356981 is a deficient number, since it is larger than the sum of its proper divisors (1).

356981 is an equidigital number, since it uses as much as digits as its factorization.

356981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 32.

The square root of 356981 is about 597.4788699193. The cubic root of 356981 is about 70.9384509243.

The spelling of 356981 in words is "three hundred fifty-six thousand, nine hundred eighty-one".