9051979421 has 2 divisors, whose sum is σ = 9051979422. Its totient is φ = 9051979420.

The previous prime is 9051979369. The next prime is 9051979427. The reversal of 9051979421 is 1249791509.

9051979421 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6709903396 + 2342076025 = 81914^2 + 48395^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9051979421 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9051979427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4525989710 + 4525989711.

It is an arithmetic number, because the mean of its divisors is an integer number (4525989711).

Almost surely, 2^9051979421 is an apocalyptic number.

It is an amenable number.

9051979421 is a deficient number, since it is larger than the sum of its proper divisors (1).

9051979421 is an equidigital number, since it uses as much as digits as its factorization.

9051979421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 204120, while the sum is 47.

The square root of 9051979421 is about 95141.8909891957. The cubic root of 9051979421 is about 2084.0806403251.

The spelling of 9051979421 in words is "nine billion, fifty-one million, nine hundred seventy-nine thousand, four hundred twenty-one".