356136493 has 2 divisors, whose sum is σ = 356136494. Its totient is φ = 356136492.

The previous prime is 356136491. The next prime is 356136509. The reversal of 356136493 is 394631653.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 257987844 + 98148649 = 16062^2 + 9907^2 .

It is a cyclic number.

It is not a de Polignac number, because 356136493 - 2¹ = 356136491 is a prime.

Together with 356136491, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (356136491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 178068246 + 178068247.

It is an arithmetic number, because the mean of its divisors is an integer number (178068247).

Almost surely, 2^356136493 is an apocalyptic number.

It is an amenable number.

356136493 is a deficient number, since it is larger than the sum of its proper divisors (1).

356136493 is an equidigital number, since it uses as much as digits as its factorization.

356136493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 174960, while the sum is 40.

The square root of 356136493 is about 18871.5789747440. The cubic root of 356136493 is about 708.8246725206.

The spelling of 356136493 in words is "three hundred fifty-six million, one hundred thirty-six thousand, four hundred ninety-three".