70869551 has 2 divisors, whose sum is σ = 70869552. Its totient is φ = 70869550.

The previous prime is 70869521. The next prime is 70869571. The reversal of 70869551 is 15596807.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70869551 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 70869499 and 70869508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70869521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35434775 + 35434776.

It is an arithmetic number, because the mean of its divisors is an integer number (35434776).

Almost surely, 2^70869551 is an apocalyptic number.

70869551 is a deficient number, since it is larger than the sum of its proper divisors (1).

70869551 is an equidigital number, since it uses as much as digits as its factorization.

70869551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 75600, while the sum is 41.

The square root of 70869551 is about 8418.4054903527. The cubic root of 70869551 is about 413.8280206278.

The spelling of 70869551 in words is "seventy million, eight hundred sixty-nine thousand, five hundred fifty-one".