690731541 has 24 divisors (see below), whose sum is σ = 1033582680. Its totient is φ = 443982336.

The previous prime is 690731533. The next prime is 690731557. The reversal of 690731541 is 145137096.

690731541 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 20439441 + 670292100 = 4521^2 + 25890^2 .

It is not a de Polignac number, because 690731541 - 2³ = 690731533 is a prime.

It is a super-2 number, since 2×690731541² = 954220123464469362, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 690731496 and 690731505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690731941) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 247345 + ... + 250121.

It is an arithmetic number, because the mean of its divisors is an integer number (43065945).

Almost surely, 2^690731541 is an apocalyptic number.

It is an amenable number.

690731541 is a deficient number, since it is larger than the sum of its proper divisors (342851139).

690731541 is a wasteful number, since it uses less digits than its factorization.

690731541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3765 (or 3762 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 690731541 is about 26281.7720292982. The cubic root of 690731541 is about 883.9677671102.

The spelling of 690731541 in words is "six hundred ninety million, seven hundred thirty-one thousand, five hundred forty-one".