70726031 has 4 divisors (see below), whose sum is σ = 70884000. Its totient is φ = 70568064.

The previous prime is 70725997. The next prime is 70726039. The reversal of 70726031 is 13062707.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13062707 = 7 ⋅1866101.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70726031 is a prime.

It is a super-2 number, since 2×70726031² = 10004342922025922, 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 (70726039) 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, 78311 + ... + 79208.

It is an arithmetic number, because the mean of its divisors is an integer number (17721000).

Almost surely, 2^70726031 is an apocalyptic number.

70726031 is a deficient number, since it is larger than the sum of its proper divisors (157969).

70726031 is a wasteful number, since it uses less digits than its factorization.

70726031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157968.

The product of its (nonzero) digits is 1764, while the sum is 26.

The square root of 70726031 is about 8409.8769907770. The cubic root of 70726031 is about 413.5484800992.

Adding to 70726031 its reverse (13062707), we get a palindrome (83788738).

The spelling of 70726031 in words is "seventy million, seven hundred twenty-six thousand, thirty-one".