70877021 has 2 divisors, whose sum is σ = 70877022. Its totient is φ = 70877020.

The previous prime is 70877017. The next prime is 70877033. The reversal of 70877021 is 12077807.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65836996 + 5040025 = 8114^2 + 2245^2 .

It is a cyclic number.

It is not a de Polignac number, because 70877021 - 2² = 70877017 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70877041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35438510 + 35438511.

It is an arithmetic number, because the mean of its divisors is an integer number (35438511).

Almost surely, 2^70877021 is an apocalyptic number.

It is an amenable number.

70877021 is a deficient number, since it is larger than the sum of its proper divisors (1).

70877021 is an equidigital number, since it uses as much as digits as its factorization.

70877021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5488, while the sum is 32.

The square root of 70877021 is about 8418.8491493790. The cubic root of 70877021 is about 413.8425599547.

The spelling of 70877021 in words is "seventy million, eight hundred seventy-seven thousand, twenty-one".