70871057 has 2 divisors, whose sum is σ = 70871058. Its totient is φ = 70871056.

The previous prime is 70871051. The next prime is 70871063. The reversal of 70871057 is 75017807.

It is a balanced prime because it is at equal distance from previous prime (70871051) and next prime (70871063).

It can be written as a sum of positive squares in only one way, i.e., 52475536 + 18395521 = 7244^2 + 4289^2 .

It is a cyclic number.

It is not a de Polignac number, because 70871057 - 2¹⁴ = 70854673 is a prime.

It is not a weakly prime, because it can be changed into another prime (70871051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35435528 + 35435529.

It is an arithmetic number, because the mean of its divisors is an integer number (35435529).

Almost surely, 2^70871057 is an apocalyptic number.

It is an amenable number.

70871057 is a deficient number, since it is larger than the sum of its proper divisors (1).

70871057 is an equidigital number, since it uses as much as digits as its factorization.

70871057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13720, while the sum is 35.

The square root of 70871057 is about 8418.4949367449. The cubic root of 70871057 is about 413.8309519318.

The spelling of 70871057 in words is "seventy million, eight hundred seventy-one thousand, fifty-seven".