70172423 has 2 divisors, whose sum is σ = 70172424. Its totient is φ = 70172422.

The previous prime is 70172411. The next prime is 70172449. The reversal of 70172423 is 32427107.

It is an a-pointer prime, because the next prime (70172449) can be obtained adding 70172423 to its sum of digits (26).

It is a weak prime.

It is an emirp because it is prime and its reverse (32427107) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70172423 - 2⁴ = 70172407 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 70172392 and 70172401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70172023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35086211 + 35086212.

It is an arithmetic number, because the mean of its divisors is an integer number (35086212).

Almost surely, 2^70172423 is an apocalyptic number.

70172423 is a deficient number, since it is larger than the sum of its proper divisors (1).

70172423 is an equidigital number, since it uses as much as digits as its factorization.

70172423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2352, while the sum is 26.

The square root of 70172423 is about 8376.8981729516. The cubic root of 70172423 is about 412.4666355628.

The spelling of 70172423 in words is "seventy million, one hundred seventy-two thousand, four hundred twenty-three".