526421957 has 2 divisors, whose sum is σ = 526421958. Its totient is φ = 526421956.

The previous prime is 526421947. The next prime is 526421969. The reversal of 526421957 is 759124625.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 300190276 + 226231681 = 17326^2 + 15041^2 .

It is a cyclic number.

It is not a de Polignac number, because 526421957 - 2⁴ = 526421941 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (526421927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 263210978 + 263210979.

It is an arithmetic number, because the mean of its divisors is an integer number (263210979).

Almost surely, 2^526421957 is an apocalyptic number.

It is an amenable number.

526421957 is a deficient number, since it is larger than the sum of its proper divisors (1).

526421957 is an equidigital number, since it uses as much as digits as its factorization.

526421957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 151200, while the sum is 41.

The square root of 526421957 is about 22943.8871379721. The cubic root of 526421957 is about 807.4419922099.

The spelling of 526421957 in words is "five hundred twenty-six million, four hundred twenty-one thousand, nine hundred fifty-seven".