70497857 has 2 divisors, whose sum is σ = 70497858. Its totient is φ = 70497856.

The previous prime is 70497841. The next prime is 70497859. The reversal of 70497857 is 75879407.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70492816 + 5041 = 8396^2 + 71^2 .

It is a cyclic number.

It is not a de Polignac number, because 70497857 - 2⁴ = 70497841 is a prime.

Together with 70497859, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (70497859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35248928 + 35248929.

It is an arithmetic number, because the mean of its divisors is an integer number (35248929).

Almost surely, 2^70497857 is an apocalyptic number.

It is an amenable number.

70497857 is a deficient number, since it is larger than the sum of its proper divisors (1).

70497857 is an equidigital number, since it uses as much as digits as its factorization.

70497857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 493920, while the sum is 47.

The square root of 70497857 is about 8396.3001971106. The cubic root of 70497857 is about 413.1032754759.

The spelling of 70497857 in words is "seventy million, four hundred ninety-seven thousand, eight hundred fifty-seven".