2991557273 has 2 divisors, whose sum is σ = 2991557274. Its totient is φ = 2991557272.

The previous prime is 2991557237. The next prime is 2991557291. The reversal of 2991557273 is 3727551992.

2991557273 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (2991557237) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1675101184 + 1316456089 = 40928^2 + 36283^2 .

It is a cyclic number.

It is not a de Polignac number, because 2991557273 - 2⁶ = 2991557209 is a prime.

It is not a weakly prime, because it can be changed into another prime (2991557203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1495778636 + 1495778637.

It is an arithmetic number, because the mean of its divisors is an integer number (1495778637).

Almost surely, 2^2991557273 is an apocalyptic number.

It is an amenable number.

2991557273 is a deficient number, since it is larger than the sum of its proper divisors (1).

2991557273 is an equidigital number, since it uses as much as digits as its factorization.

2991557273 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1190700, while the sum is 50.

The square root of 2991557273 is about 54695.1302494107. The cubic root of 2991557273 is about 1440.8953525475.

The spelling of 2991557273 in words is "two billion, nine hundred ninety-one million, five hundred fifty-seven thousand, two hundred seventy-three".