70817129 has 2 divisors, whose sum is σ = 70817130. Its totient is φ = 70817128.

The previous prime is 70817111. The next prime is 70817137. The reversal of 70817129 is 92171807.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51912025 + 18905104 = 7205^2 + 4348^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70817129 is a prime.

It is not a weakly prime, because it can be changed into another prime (70817029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35408564 + 35408565.

It is an arithmetic number, because the mean of its divisors is an integer number (35408565).

Almost surely, 2^70817129 is an apocalyptic number.

It is an amenable number.

70817129 is a deficient number, since it is larger than the sum of its proper divisors (1).

70817129 is an equidigital number, since it uses as much as digits as its factorization.

70817129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7056, while the sum is 35.

The square root of 70817129 is about 8415.2913793879. The cubic root of 70817129 is about 413.7259596660.

The spelling of 70817129 in words is "seventy million, eight hundred seventeen thousand, one hundred twenty-nine".