691465141 has 4 divisors (see below), whose sum is σ = 691523392. Its totient is φ = 691406892.

The previous prime is 691465133. The next prime is 691465171. The reversal of 691465141 is 141564196.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 691465141 - 2³ = 691465133 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 691465141.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (691465111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4221 + ... + 37426.

It is an arithmetic number, because the mean of its divisors is an integer number (172880848).

Almost surely, 2^691465141 is an apocalyptic number.

It is an amenable number.

691465141 is a deficient number, since it is larger than the sum of its proper divisors (58251).

691465141 is a wasteful number, since it uses less digits than its factorization.

691465141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58250.

The product of its digits is 25920, while the sum is 37.

The square root of 691465141 is about 26295.7247665852. The cubic root of 691465141 is about 884.2805993641.

The spelling of 691465141 in words is "six hundred ninety-one million, four hundred sixty-five thousand, one hundred forty-one".