70698023881 has 3 divisors (see below), whose sum is σ = 70698289773. Its totient is φ = 70697757990.

The previous prime is 70698023873. The next prime is 70698023917. The reversal of 70698023881 is 18832089607.

The square root of 70698023881 is 265891.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 18832089607 = 34381 ⋅547747.

It is not a de Polignac number, because 70698023881 - 2³ = 70698023873 is a prime.

It is a super-2 number, since 2×70698023881² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70698023861) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 132946 + ... + 398836.

It is an arithmetic number, because the mean of its divisors is an integer number (23566096591).

Almost surely, 2^70698023881 is an apocalyptic number.

70698023881 is the 265891-st square number.

70698023881 is the 132946-th centered octagonal number.

It is an amenable number.

70698023881 is a deficient number, since it is larger than the sum of its proper divisors (265892).

70698023881 is an frugal number, since it uses more digits than its factorization.

70698023881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 531782 (or 265891 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 52.

The spelling of 70698023881 in words is "seventy billion, six hundred ninety-eight million, twenty-three thousand, eight hundred eighty-one".