700138805 has 4 divisors (see below), whose sum is σ = 840166572. Its totient is φ = 560111040.

The previous prime is 700138787. The next prime is 700138807. The reversal of 700138805 is 508831007.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 508831007 = 3253 ⋅156419.

It can be written as a sum of positive squares in 2 ways, for example, as 538518436 + 161620369 = 23206^2 + 12713^2 .

It is not a de Polignac number, because 700138805 - 2⁶ = 700138741 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (700138807) 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, 70013876 + ... + 70013885.

It is an arithmetic number, because the mean of its divisors is an integer number (210041643).

Almost surely, 2^700138805 is an apocalyptic number.

It is an amenable number.

700138805 is a deficient number, since it is larger than the sum of its proper divisors (140027767).

700138805 is a wasteful number, since it uses less digits than its factorization.

700138805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140027766.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 700138805 is about 26460.1361485537. The cubic root of 700138805 is about 887.9626862043.

The spelling of 700138805 in words is "seven hundred million, one hundred thirty-eight thousand, eight hundred five".