70078523 has 4 divisors (see below), whose sum is σ = 70801080. Its totient is φ = 69355968.

The previous prime is 70078501. The next prime is 70078531. The reversal of 70078523 is 32587007.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32587007 = 2591 ⋅12577.

It is a cyclic number.

It is not a de Polignac number, because 70078523 - 2¹⁸ = 69816379 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 70078523.

It is not an unprimeable number, because it can be changed into a prime (70078823) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 361133 + ... + 361326.

It is an arithmetic number, because the mean of its divisors is an integer number (17700270).

Almost surely, 2^70078523 is an apocalyptic number.

70078523 is a deficient number, since it is larger than the sum of its proper divisors (722557).

70078523 is an equidigital number, since it uses as much as digits as its factorization.

70078523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 722556.

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 70078523 is about 8371.2915968804. The cubic root of 70078523 is about 412.2825751022.

The spelling of 70078523 in words is "seventy million, seventy-eight thousand, five hundred twenty-three".