4970777921 has 2 divisors, whose sum is σ = 4970777922. Its totient is φ = 4970777920.

The previous prime is 4970777897. The next prime is 4970777957. The reversal of 4970777921 is 1297770794.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4268792896 + 701985025 = 65336^2 + 26495^2 .

It is a cyclic number.

It is not a de Polignac number, because 4970777921 - 2²² = 4966583617 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (4970779921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2485388960 + 2485388961.

It is an arithmetic number, because the mean of its divisors is an integer number (2485388961).

Almost surely, 2^4970777921 is an apocalyptic number.

It is an amenable number.

4970777921 is a deficient number, since it is larger than the sum of its proper divisors (1).

4970777921 is an equidigital number, since it uses as much as digits as its factorization.

4970777921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1555848, while the sum is 53.

The square root of 4970777921 is about 70503.7440211511. The cubic root of 4970777921 is about 1706.6381655999.

The spelling of 4970777921 in words is "four billion, nine hundred seventy million, seven hundred seventy-seven thousand, nine hundred twenty-one".