699901 has 4 divisors (see below), whose sum is σ = 701692. Its totient is φ = 698112.

The previous prime is 699863. The next prime is 699931. The reversal of 699901 is 109996.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 391876 + 308025 = 626^2 + 555^2 .

It is a cyclic number.

It is not a de Polignac number, because 699901 - 2¹³ = 691709 is a prime.

It is a super-2 number, since 2×699901² = 979722819602, which contains 22 as substring.

It is a Duffinian number.

699901 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (699931) 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, 30 + ... + 1183.

It is an arithmetic number, because the mean of its divisors is an integer number (175423).

2⁶⁹⁹⁹⁰¹ is an apocalyptic number.

It is an amenable number.

699901 is a deficient number, since it is larger than the sum of its proper divisors (1791).

699901 is a wasteful number, since it uses less digits than its factorization.

699901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1790.

The product of its (nonzero) digits is 4374, while the sum is 34.

The square root of 699901 is about 836.6008606259. The cubic root of 699901 is about 88.7862141438.

It can be divided in two parts, 699 and 901, that added together give a square (1600 = 40²).

The spelling of 699901 in words is "six hundred ninety-nine thousand, nine hundred one".