691064241 has 8 divisors (see below), whose sum is σ = 1053050304. Its totient is φ = 394893840.

The previous prime is 691064239. The next prime is 691064261. The reversal of 691064241 is 142460196.

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

It is not a de Polignac number, because 691064241 - 2¹ = 691064239 is a prime.

It is not an unprimeable number, because it can be changed into a prime (691064221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16453890 + ... + 16453931.

It is an arithmetic number, because the mean of its divisors is an integer number (131631288).

Almost surely, 2^691064241 is an apocalyptic number.

It is an amenable number.

691064241 is a deficient number, since it is larger than the sum of its proper divisors (361986063).

691064241 is a wasteful number, since it uses less digits than its factorization.

691064241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32907831.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 691064241 is about 26288.1007491983. The cubic root of 691064241 is about 884.1096692593.

The spelling of 691064241 in words is "six hundred ninety-one million, sixty-four thousand, two hundred forty-one".