1188801457 has 2 divisors, whose sum is σ = 1188801458. Its totient is φ = 1188801456.

The previous prime is 1188801433. The next prime is 1188801461. The reversal of 1188801457 is 7541088811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1188801441 + 16 = 34479^2 + 4^2 .

It is an emirp because it is prime and its reverse (7541088811) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1188801457 - 2¹⁵ = 1188768689 is a prime.

It is not a weakly prime, because it can be changed into another prime (1188801487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 594400728 + 594400729.

It is an arithmetic number, because the mean of its divisors is an integer number (594400729).

Almost surely, 2^1188801457 is an apocalyptic number.

It is an amenable number.

1188801457 is a deficient number, since it is larger than the sum of its proper divisors (1).

1188801457 is an equidigital number, since it uses as much as digits as its factorization.

1188801457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 71680, while the sum is 43.

The square root of 1188801457 is about 34479.0002320253. Note that the first 3 decimals coincide. The cubic root of 1188801457 is about 1059.3426139274.

The spelling of 1188801457 in words is "one billion, one hundred eighty-eight million, eight hundred one thousand, four hundred fifty-seven".