691077041 has 4 divisors (see below), whose sum is σ = 692570112. Its totient is φ = 689583972.

The previous prime is 691077031. The next prime is 691077053. The reversal of 691077041 is 140770196.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 691077041 - 2¹⁸ = 690814897 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 691076992 and 691077010.

It is not an unprimeable number, because it can be changed into a prime (691077001) 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 3 ways as a sum of consecutive naturals, for example, 745841 + ... + 746766.

It is an arithmetic number, because the mean of its divisors is an integer number (173142528).

Almost surely, 2^691077041 is an apocalyptic number.

It is an amenable number.

691077041 is a deficient number, since it is larger than the sum of its proper divisors (1493071).

691077041 is a wasteful number, since it uses less digits than its factorization.

691077041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1493070.

The product of its (nonzero) digits is 10584, while the sum is 35.

The square root of 691077041 is about 26288.3442042286. The cubic root of 691077041 is about 884.1151277648.

The spelling of 691077041 in words is "six hundred ninety-one million, seventy-seven thousand, forty-one".