70143869 has 2 divisors, whose sum is σ = 70143870. Its totient is φ = 70143868.

The previous prime is 70143847. The next prime is 70143883. The reversal of 70143869 is 96834107.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62647225 + 7496644 = 7915^2 + 2738^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70143869 is a prime.

It is a super-2 number, since 2×70143869² = 9840324716578322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70143809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35071934 + 35071935.

It is an arithmetic number, because the mean of its divisors is an integer number (35071935).

Almost surely, 2^70143869 is an apocalyptic number.

It is an amenable number.

70143869 is a deficient number, since it is larger than the sum of its proper divisors (1).

70143869 is an equidigital number, since it uses as much as digits as its factorization.

70143869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 70143869 is about 8375.1936694025. The cubic root of 70143869 is about 412.4106821002.

The spelling of 70143869 in words is "seventy million, one hundred forty-three thousand, eight hundred sixty-nine".