70686461 has 2 divisors, whose sum is σ = 70686462. Its totient is φ = 70686460.

The previous prime is 70686457. The next prime is 70686467. The reversal of 70686461 is 16468607.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70644025 + 42436 = 8405^2 + 206^2 .

It is a cyclic number.

It is not a de Polignac number, because 70686461 - 2² = 70686457 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70686467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35343230 + 35343231.

It is an arithmetic number, because the mean of its divisors is an integer number (35343231).

Almost surely, 2^70686461 is an apocalyptic number.

It is an amenable number.

70686461 is a deficient number, since it is larger than the sum of its proper divisors (1).

70686461 is an equidigital number, since it uses as much as digits as its factorization.

70686461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 70686461 is about 8407.5240707357. The cubic root of 70686461 is about 413.4713412867.

The spelling of 70686461 in words is "seventy million, six hundred eighty-six thousand, four hundred sixty-one".