904011961 has 4 divisors (see below), whose sum is σ = 905355892. Its totient is φ = 902668032.

The previous prime is 904011929. The next prime is 904011971. The reversal of 904011961 is 169110409.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 169110409 = 13 ⋅13008493.

It can be written as a sum of positive squares in 2 ways, for example, as 260628736 + 643383225 = 16144^2 + 25365^2 .

It is a cyclic number.

It is not a de Polignac number, because 904011961 - 2⁵ = 904011929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (904011971) 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, 670956 + ... + 672301.

It is an arithmetic number, because the mean of its divisors is an integer number (226338973).

Almost surely, 2^904011961 is an apocalyptic number.

It is an amenable number.

904011961 is a deficient number, since it is larger than the sum of its proper divisors (1343931).

904011961 is a wasteful number, since it uses less digits than its factorization.

904011961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1343930.

The product of its (nonzero) digits is 1944, while the sum is 31.

The square root of 904011961 is about 30066.7916645591. The cubic root of 904011961 is about 966.9218898953.

The spelling of 904011961 in words is "nine hundred four million, eleven thousand, nine hundred sixty-one".