70081519 has 4 divisors (see below), whose sum is σ = 73770040. Its totient is φ = 66393000.

The previous prime is 70081513. The next prime is 70081547. The reversal of 70081519 is 91518007.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 70081519 - 2³ = 70081511 is a prime.

It is a super-2 number, since 2×70081519² = 9822838610694722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70081511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1844232 + ... + 1844269.

It is an arithmetic number, because the mean of its divisors is an integer number (18442510).

Almost surely, 2^70081519 is an apocalyptic number.

70081519 is a deficient number, since it is larger than the sum of its proper divisors (3688521).

70081519 is a wasteful number, since it uses less digits than its factorization.

70081519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3688520.

The product of its (nonzero) digits is 2520, while the sum is 31.

The square root of 70081519 is about 8371.4705398753. The cubic root of 70081519 is about 412.2884503259.

The spelling of 70081519 in words is "seventy million, eighty-one thousand, five hundred nineteen".