70672291 has 4 divisors (see below), whose sum is σ = 70715032. Its totient is φ = 70629552.

The previous prime is 70672289. The next prime is 70672351. The reversal of 70672291 is 19227607.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19227607 = 7 ⋅2746801.

It is a cyclic number.

It is not a de Polignac number, because 70672291 - 2¹ = 70672289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70672211) 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, 18786 + ... + 22231.

It is an arithmetic number, because the mean of its divisors is an integer number (17678758).

Almost surely, 2^70672291 is an apocalyptic number.

70672291 is a deficient number, since it is larger than the sum of its proper divisors (42741).

70672291 is a wasteful number, since it uses less digits than its factorization.

70672291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42740.

The product of its (nonzero) digits is 10584, while the sum is 34.

The square root of 70672291 is about 8406.6813309415. The cubic root of 70672291 is about 413.4437109109.

Adding to 70672291 its reverse (19227607), we get a palindrome (89899898).

The spelling of 70672291 in words is "seventy million, six hundred seventy-two thousand, two hundred ninety-one".