1139525797 has 4 divisors (see below), whose sum is σ = 1178819820. Its totient is φ = 1100231776.

The previous prime is 1139525791. The next prime is 1139525801. The reversal of 1139525797 is 7975259311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7975259311 = 911 ⋅8754401.

It can be written as a sum of positive squares in 2 ways, for example, as 756580036 + 382945761 = 27506^2 + 19569^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1139525797 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1139525797.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1139525791) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19646968 + ... + 19647025.

It is an arithmetic number, because the mean of its divisors is an integer number (294704955).

Almost surely, 2^1139525797 is an apocalyptic number.

It is an amenable number.

1139525797 is a deficient number, since it is larger than the sum of its proper divisors (39294023).

1139525797 is an equidigital number, since it uses as much as digits as its factorization.

1139525797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39294022.

The product of its digits is 595350, while the sum is 49.

The square root of 1139525797 is about 33756.8629614779. The cubic root of 1139525797 is about 1044.4990607444.

The spelling of 1139525797 in words is "one billion, one hundred thirty-nine million, five hundred twenty-five thousand, seven hundred ninety-seven".