70123513 has 2 divisors, whose sum is σ = 70123514. Its totient is φ = 70123512.

The previous prime is 70123511. The next prime is 70123553. The reversal of 70123513 is 31532107.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70107129 + 16384 = 8373^2 + 128^2 .

It is a cyclic number.

It is not a de Polignac number, because 70123513 - 2¹ = 70123511 is a prime.

It is a super-2 number, since 2×70123513² = 9834614150922338, which contains 22 as substring.

Together with 70123511, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (70123511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35061756 + 35061757.

It is an arithmetic number, because the mean of its divisors is an integer number (35061757).

Almost surely, 2^70123513 is an apocalyptic number.

It is an amenable number.

70123513 is a deficient number, since it is larger than the sum of its proper divisors (1).

70123513 is an equidigital number, since it uses as much as digits as its factorization.

70123513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 630, while the sum is 22.

The square root of 70123513 is about 8373.9783257422. The cubic root of 70123513 is about 412.3707838920.

The spelling of 70123513 in words is "seventy million, one hundred twenty-three thousand, five hundred thirteen".