699556001 has 6 divisors (see below), whose sum is σ = 743127270. Its totient is φ = 658405376.

The previous prime is 699555973. The next prime is 699556019. The reversal of 699556001 is 100655996.

It can be written as a sum of positive squares in 3 ways, for example, as 219069601 + 480486400 = 14801^2 + 21920^2 .

It is not a de Polignac number, because 699556001 - 2⁶ = 699555937 is a prime.

It is a super-2 number, since 2×699556001² = 978757197070224002, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 699556001.

It is not an unprimeable number, because it can be changed into a prime (699556031) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1210016 + ... + 1210593.

It is an arithmetic number, because the mean of its divisors is an integer number (123854545).

Almost surely, 2^699556001 is an apocalyptic number.

It is an amenable number.

699556001 is a deficient number, since it is larger than the sum of its proper divisors (43571269).

699556001 is a wasteful number, since it uses less digits than its factorization.

699556001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2420643 (or 2420626 counting only the distinct ones).

The product of its (nonzero) digits is 72900, while the sum is 41.

The square root of 699556001 is about 26449.1209872842. The cubic root of 699556001 is about 887.7162341858.

The spelling of 699556001 in words is "six hundred ninety-nine million, five hundred fifty-six thousand, one".