70287961 has 2 divisors, whose sum is σ = 70287962. Its totient is φ = 70287960.

The previous prime is 70287953. The next prime is 70288007. The reversal of 70287961 is 16978207.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57471561 + 12816400 = 7581^2 + 3580^2 .

It is an emirp because it is prime and its reverse (16978207) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70287961 - 2³ = 70287953 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (70257961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35143980 + 35143981.

It is an arithmetic number, because the mean of its divisors is an integer number (35143981).

Almost surely, 2^70287961 is an apocalyptic number.

It is an amenable number.

70287961 is a deficient number, since it is larger than the sum of its proper divisors (1).

70287961 is an equidigital number, since it uses as much as digits as its factorization.

70287961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42336, while the sum is 40.

The square root of 70287961 is about 8383.7915646800. The cubic root of 70287961 is about 412.6928851218.

The spelling of 70287961 in words is "seventy million, two hundred eighty-seven thousand, nine hundred sixty-one".