961541813 has 4 divisors (see below), whose sum is σ = 968459520. Its totient is φ = 954624108.

The previous prime is 961541783. The next prime is 961541827. The reversal of 961541813 is 318145169.

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 a de Polignac number, because none of the positive numbers 2^k-961541813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (961541843) 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, 3458645 + ... + 3458922.

It is an arithmetic number, because the mean of its divisors is an integer number (242114880).

Almost surely, 2^961541813 is an apocalyptic number.

It is an amenable number.

961541813 is a deficient number, since it is larger than the sum of its proper divisors (6917707).

961541813 is a wasteful number, since it uses less digits than its factorization.

961541813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6917706.

The product of its digits is 25920, while the sum is 38.

The square root of 961541813 is about 31008.7376879485. The cubic root of 961541813 is about 987.0126636224.

The spelling of 961541813 in words is "nine hundred sixty-one million, five hundred forty-one thousand, eight hundred thirteen".