355681047 has 4 divisors (see below), whose sum is σ = 474241400. Its totient is φ = 237120696.

The previous prime is 355681033. The next prime is 355681063. The reversal of 355681047 is 740186553.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 355681047 - 2⁴ = 355681031 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 355680996 and 355681014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (355681747) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59280172 + ... + 59280177.

It is an arithmetic number, because the mean of its divisors is an integer number (118560350).

Almost surely, 2^355681047 is an apocalyptic number.

355681047 is a deficient number, since it is larger than the sum of its proper divisors (118560353).

355681047 is a wasteful number, since it uses less digits than its factorization.

355681047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118560352.

The product of its (nonzero) digits is 100800, while the sum is 39.

The square root of 355681047 is about 18859.5081325044. The cubic root of 355681047 is about 708.5223829173.

The spelling of 355681047 in words is "three hundred fifty-five million, six hundred eighty-one thousand, forty-seven".