526421947 has 2 divisors, whose sum is σ = 526421948. Its totient is φ = 526421946.

The previous prime is 526421941. The next prime is 526421957. The reversal of 526421947 is 749124625.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-526421947 is a prime.

It is not a weakly prime, because it can be changed into another prime (526421941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 263210973 + 263210974.

It is an arithmetic number, because the mean of its divisors is an integer number (263210974).

Almost surely, 2^526421947 is an apocalyptic number.

526421947 is a deficient number, since it is larger than the sum of its proper divisors (1).

526421947 is an equidigital number, since it uses as much as digits as its factorization.

526421947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 40.

The square root of 526421947 is about 22943.8869200491. The cubic root of 526421947 is about 807.4419870971.

The spelling of 526421947 in words is "five hundred twenty-six million, four hundred twenty-one thousand, nine hundred forty-seven".