947396491 has 2 divisors, whose sum is σ = 947396492. Its totient is φ = 947396490.

The previous prime is 947396479. The next prime is 947396521. The reversal of 947396491 is 194693749.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 947396491 - 2¹⁵ = 947363723 is a prime.

It is a super-2 number, since 2×947396491² = 1795120222318226162, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (947396431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 473698245 + 473698246.

It is an arithmetic number, because the mean of its divisors is an integer number (473698246).

Almost surely, 2^947396491 is an apocalyptic number.

947396491 is a deficient number, since it is larger than the sum of its proper divisors (1).

947396491 is an equidigital number, since it uses as much as digits as its factorization.

947396491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1469664, while the sum is 52.

The square root of 947396491 is about 30779.8065458508. The cubic root of 947396491 is about 982.1487251980.

The spelling of 947396491 in words is "nine hundred forty-seven million, three hundred ninety-six thousand, four hundred ninety-one".