70980709 has 2 divisors, whose sum is σ = 70980710. Its totient is φ = 70980708.

The previous prime is 70980683. The next prime is 70980733. The reversal of 70980709 is 90708907.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70930084 + 50625 = 8422^2 + 225^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70980709 is a prime.

It is a super-2 number, since 2×70980709² = 10076522100285362, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70980109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35490354 + 35490355.

It is an arithmetic number, because the mean of its divisors is an integer number (35490355).

Almost surely, 2^70980709 is an apocalyptic number.

It is an amenable number.

70980709 is a deficient number, since it is larger than the sum of its proper divisors (1).

70980709 is an equidigital number, since it uses as much as digits as its factorization.

70980709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31752, while the sum is 40.

The square root of 70980709 is about 8425.0049851617. The cubic root of 70980709 is about 414.0442689559.

It can be divided in two parts, 709 and 80709, that added together give a palindrome (81418).

The spelling of 70980709 in words is "seventy million, nine hundred eighty thousand, seven hundred nine".