690033993 has 8 divisors (see below), whose sum is σ = 1003685856. Its totient is φ = 418202400.

The previous prime is 690033989. The next prime is 690034027. The reversal of 690033993 is 399330096.

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

It is not a de Polignac number, because 690033993 - 2² = 690033989 is a prime.

It is a super-2 number, since 2×690033993² = 952293822991048098, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (690033293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10455028 + ... + 10455093.

It is an arithmetic number, because the mean of its divisors is an integer number (125460732).

Almost surely, 2^690033993 is an apocalyptic number.

It is an amenable number.

690033993 is a deficient number, since it is larger than the sum of its proper divisors (313651863).

690033993 is a wasteful number, since it uses less digits than its factorization.

690033993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20910135.

The product of its (nonzero) digits is 118098, while the sum is 42.

The square root of 690033993 is about 26268.4981108551. The cubic root of 690033993 is about 883.6701031637.

The spelling of 690033993 in words is "six hundred ninety million, thirty-three thousand, nine hundred ninety-three".