1157747447 has 4 divisors (see below), whose sum is σ = 1225850256. Its totient is φ = 1089644640.

The previous prime is 1157747441. The next prime is 1157747453. The reversal of 1157747447 is 7447477511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7447477511 = 3019 ⋅2466869.

It is an interprime number because it is at equal distance from previous prime (1157747441) and next prime (1157747453).

It is a cyclic number.

It is not a de Polignac number, because 1157747447 - 2¹² = 1157743351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1157747441) 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, 34051379 + ... + 34051412.

It is an arithmetic number, because the mean of its divisors is an integer number (306462564).

Almost surely, 2^1157747447 is an apocalyptic number.

1157747447 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1157747447 is a deficient number, since it is larger than the sum of its proper divisors (68102809).

1157747447 is an equidigital number, since it uses as much as digits as its factorization.

1157747447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68102808.

The product of its digits is 768320, while the sum is 47.

The square root of 1157747447 is about 34025.6880459455. The cubic root of 1157747447 is about 1050.0370197076.

The spelling of 1157747447 in words is "one billion, one hundred fifty-seven million, seven hundred forty-seven thousand, four hundred forty-seven".