70672081 has 4 divisors (see below), whose sum is σ = 70708032. Its totient is φ = 70636132.

The previous prime is 70672079. The next prime is 70672097. The reversal of 70672081 is 18027607.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 70672081 - 2¹ = 70672079 is a prime.

It is a super-2 number, since 2×70672081² = 9989086065741122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70672181) 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, 14845 + ... + 19018.

It is an arithmetic number, because the mean of its divisors is an integer number (17677008).

Almost surely, 2^70672081 is an apocalyptic number.

It is an amenable number.

70672081 is a deficient number, since it is larger than the sum of its proper divisors (35951).

70672081 is a wasteful number, since it uses less digits than its factorization.

70672081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35950.

The product of its (nonzero) digits is 4704, while the sum is 31.

The square root of 70672081 is about 8406.6688408668. The cubic root of 70672081 is about 413.4433013998.

Adding to 70672081 its reverse (18027607), we get a palindrome (88699688).

The spelling of 70672081 in words is "seventy million, six hundred seventy-two thousand, eighty-one".