909972061 has 2 divisors, whose sum is σ = 909972062. Its totient is φ = 909972060.

The previous prime is 909972013. The next prime is 909972071. The reversal of 909972061 is 160279909.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 821968900 + 88003161 = 28670^2 + 9381^2 .

It is an emirp because it is prime and its reverse (160279909) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 909972061 - 2¹¹ = 909970013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 909971999 and 909972017.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (909972001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 454986030 + 454986031.

It is an arithmetic number, because the mean of its divisors is an integer number (454986031).

Almost surely, 2^909972061 is an apocalyptic number.

It is an amenable number.

909972061 is a deficient number, since it is larger than the sum of its proper divisors (1).

909972061 is an equidigital number, since it uses as much as digits as its factorization.

909972061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 61236, while the sum is 43.

The square root of 909972061 is about 30165.7431700265. The cubic root of 909972061 is about 969.0421908987.

The spelling of 909972061 in words is "nine hundred nine million, nine hundred seventy-two thousand, sixty-one".