699894001 has 4 divisors (see below), whose sum is σ = 699948004. Its totient is φ = 699840000.

The previous prime is 699893981. The next prime is 699894007. The reversal of 699894001 is 100498996.

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.

It can be written as a sum of positive squares in 2 ways, for example, as 679957776 + 19936225 = 26076^2 + 4465^2 .

It is a 3-Lehmer number, since φ(699894001) divides (699894001-1)³.

It is a cyclic number.

It is not a de Polignac number, because 699894001 - 2⁵ = 699893969 is a prime.

It is a super-2 number, since 2×699894001² = 979703225271576002, which contains 22 as substring.

It is a deceptive number, since it divides R_699894000.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (699894007) 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, 5401 + ... + 37801.

It is an arithmetic number, because the mean of its divisors is an integer number (174987001).

Almost surely, 2^699894001 is an apocalyptic number.

699894001 is the 21601-st pentagonal number.

It is an amenable number.

699894001 is a deficient number, since it is larger than the sum of its proper divisors (54003).

699894001 is a wasteful number, since it uses less digits than its factorization.

699894001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54002.

The product of its (nonzero) digits is 139968, while the sum is 46.

The square root of 699894001 is about 26455.5098419970. The cubic root of 699894001 is about 887.8591818915.

The spelling of 699894001 in words is "six hundred ninety-nine million, eight hundred ninety-four thousand, one".