699213745 has 8 divisors (see below), whose sum is σ = 846754920. Its totient is φ = 554238720.

The previous prime is 699213743. The next prime is 699213769. The reversal of 699213745 is 547312996.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 266864896 + 432348849 = 16336^2 + 20793^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 699213745 - 2¹ = 699213743 is a prime.

It is a super-2 number, since 2×699213745² = 977799722393850050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 699213695 and 699213704.

It is not an unprimeable number, because it can be changed into a prime (699213743) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 640936 + ... + 642025.

It is an arithmetic number, because the mean of its divisors is an integer number (105844365).

Almost surely, 2^699213745 is an apocalyptic number.

It is an amenable number.

699213745 is a deficient number, since it is larger than the sum of its proper divisors (147541175).

699213745 is a wasteful number, since it uses less digits than its factorization.

699213745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1283075.

The product of its digits is 408240, while the sum is 46.

The square root of 699213745 is about 26442.6501130276. The cubic root of 699213745 is about 887.5714395974.

The spelling of 699213745 in words is "six hundred ninety-nine million, two hundred thirteen thousand, seven hundred forty-five".