7119477721 has 2 divisors, whose sum is σ = 7119477722. Its totient is φ = 7119477720.

The previous prime is 7119477649. The next prime is 7119477727. The reversal of 7119477721 is 1277749117.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4571247321 + 2548230400 = 67611^2 + 50480^2 .

It is a cyclic number.

It is not a de Polignac number, because 7119477721 - 2¹³ = 7119469529 is a prime.

It is not a weakly prime, because it can be changed into another prime (7119477727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3559738860 + 3559738861.

It is an arithmetic number, because the mean of its divisors is an integer number (3559738861).

Almost surely, 2^7119477721 is an apocalyptic number.

It is an amenable number.

7119477721 is a deficient number, since it is larger than the sum of its proper divisors (1).

7119477721 is an equidigital number, since it uses as much as digits as its factorization.

7119477721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 172872, while the sum is 46.

The square root of 7119477721 is about 84376.9975822795. The cubic root of 7119477721 is about 1923.7533027150.

The spelling of 7119477721 in words is "seven billion, one hundred nineteen million, four hundred seventy-seven thousand, seven hundred twenty-one".