415681961 has 2 divisors, whose sum is σ = 415681962. Its totient is φ = 415681960.

The previous prime is 415681933. The next prime is 415681993. The reversal of 415681961 is 169186514.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 415344400 + 337561 = 20380^2 + 581^2 .

It is a cyclic number.

It is not a de Polignac number, because 415681961 - 2⁶ = 415681897 is a prime.

It is not a weakly prime, because it can be changed into another prime (415681901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 207840980 + 207840981.

It is an arithmetic number, because the mean of its divisors is an integer number (207840981).

Almost surely, 2^415681961 is an apocalyptic number.

It is an amenable number.

415681961 is a deficient number, since it is larger than the sum of its proper divisors (1).

415681961 is an equidigital number, since it uses as much as digits as its factorization.

415681961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 41.

The square root of 415681961 is about 20388.2799912106. The cubic root of 415681961 is about 746.3119450238.

The spelling of 415681961 in words is "four hundred fifteen million, six hundred eighty-one thousand, nine hundred sixty-one".