70720319 has 4 divisors (see below), whose sum is σ = 70767696. Its totient is φ = 70672944.

The previous prime is 70720303. The next prime is 70720333. The reversal of 70720319 is 91302707.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91302707 = 1549 ⋅58943.

It is a cyclic number.

It is not a de Polignac number, because 70720319 - 2⁴ = 70720303 is a prime.

It is a super-2 number, since 2×70720319² = 10002727038923522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 70720291 and 70720300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70720519) 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, 21374 + ... + 24459.

It is an arithmetic number, because the mean of its divisors is an integer number (17691924).

Almost surely, 2^70720319 is an apocalyptic number.

70720319 is a deficient number, since it is larger than the sum of its proper divisors (47377).

70720319 is a wasteful number, since it uses less digits than its factorization.

70720319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47376.

The product of its (nonzero) digits is 2646, while the sum is 29.

The square root of 70720319 is about 8409.5373832334. The cubic root of 70720319 is about 413.5373467513.

The spelling of 70720319 in words is "seventy million, seven hundred twenty thousand, three hundred nineteen".