70519663 has 4 divisors (see below), whose sum is σ = 70575088. Its totient is φ = 70464240.

The previous prime is 70519661. The next prime is 70519667. The reversal of 70519663 is 36691507.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36691507 = 31 ⋅1183597.

It is a cyclic number.

It is not a de Polignac number, because 70519663 - 2¹ = 70519661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70519661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25758 + ... + 28363.

It is an arithmetic number, because the mean of its divisors is an integer number (17643772).

Almost surely, 2^70519663 is an apocalyptic number.

70519663 is a deficient number, since it is larger than the sum of its proper divisors (55425).

70519663 is a wasteful number, since it uses less digits than its factorization.

70519663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55424.

The product of its (nonzero) digits is 34020, while the sum is 37.

The square root of 70519663 is about 8397.5986448508. The cubic root of 70519663 is about 413.1458640111.

The spelling of 70519663 in words is "seventy million, five hundred nineteen thousand, six hundred sixty-three".