690191873937 has 6 divisors (see below), whose sum is σ = 996943817922. Its totient is φ = 460127915952.

The previous prime is 690191873933. The next prime is 690191873941. The reversal of 690191873937 is 739378191096.

690191873937 is a `hidden beast` number, since 69 + 0 + 1 + 9 + 187 + 393 + 7 = 666.

It is an interprime number because it is at equal distance from previous prime (690191873933) and next prime (690191873941).

It can be written as a sum of positive squares in only one way, i.e., 592647466896 + 97544407041 = 769836^2 + 312321^2 .

It is not a de Polignac number, because 690191873937 - 2² = 690191873933 is a prime.

It is not an unprimeable number, because it can be changed into a prime (690191873933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 38343992988 + ... + 38343993005.

It is an arithmetic number, because the mean of its divisors is an integer number (166157302987).

Almost surely, 2^690191873937 is an apocalyptic number.

It is an amenable number.

690191873937 is a deficient number, since it is larger than the sum of its proper divisors (306751943985).

690191873937 is a wasteful number, since it uses less digits than its factorization.

690191873937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76687985999 (or 76687985996 counting only the distinct ones).

The product of its (nonzero) digits is 15431472, while the sum is 63.

The spelling of 690191873937 in words is "six hundred ninety billion, one hundred ninety-one million, eight hundred seventy-three thousand, nine hundred thirty-seven".