947228193 has 6 divisors (see below), whose sum is σ = 1368218514. Its totient is φ = 631485456.

The previous prime is 947228153. The next prime is 947228201. The reversal of 947228193 is 391822749.

It can be written as a sum of positive squares in only one way, i.e., 683717904 + 263510289 = 26148^2 + 16233^2 .

It is not a de Polignac number, because 947228193 - 2¹² = 947224097 is a prime.

It is a super-2 number, since 2×947228193² = 1794482499228090498, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (947228153) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 52623780 + ... + 52623797.

It is an arithmetic number, because the mean of its divisors is an integer number (228036419).

Almost surely, 2^947228193 is an apocalyptic number.

It is an amenable number.

947228193 is a deficient number, since it is larger than the sum of its proper divisors (420990321).

947228193 is a wasteful number, since it uses less digits than its factorization.

947228193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105247583 (or 105247580 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 947228193 is about 30777.0725216028. The cubic root of 947228193 is about 982.0905645946.

The spelling of 947228193 in words is "nine hundred forty-seven million, two hundred twenty-eight thousand, one hundred ninety-three".