1117528397 has 2 divisors, whose sum is σ = 1117528398. Its totient is φ = 1117528396.

The previous prime is 1117528387. The next prime is 1117528463. The reversal of 1117528397 is 7938257111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 585349636 + 532178761 = 24194^2 + 23069^2 .

It is an emirp because it is prime and its reverse (7938257111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1117528397 - 2⁸ = 1117528141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1117528387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 558764198 + 558764199.

It is an arithmetic number, because the mean of its divisors is an integer number (558764199).

Almost surely, 2^1117528397 is an apocalyptic number.

It is an amenable number.

1117528397 is a deficient number, since it is larger than the sum of its proper divisors (1).

1117528397 is an equidigital number, since it uses as much as digits as its factorization.

1117528397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 105840, while the sum is 44.

The square root of 1117528397 is about 33429.4540338307. The cubic root of 1117528397 is about 1037.7343420326.

The spelling of 1117528397 in words is "one billion, one hundred seventeen million, five hundred twenty-eight thousand, three hundred ninety-seven".