1147377287 has 18 divisors (see below), whose sum is σ = 1394116488. Its totient is φ = 939774528.

The previous prime is 1147377223. The next prime is 1147377293. The reversal of 1147377287 is 7827737411.

It is a happy number.

It is not a de Polignac number, because 1147377287 - 2⁶ = 1147377223 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 (1147377887) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1136639 + ... + 1137647.

It is an arithmetic number, because the mean of its divisors is an integer number (77450916).

Almost surely, 2^1147377287 is an apocalyptic number.

1147377287 is a deficient number, since it is larger than the sum of its proper divisors (246739201).

1147377287 is an frugal number, since it uses more digits than its factorization.

1147377287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2055 (or 1039 counting only the distinct ones).

The product of its digits is 460992, while the sum is 47.

The square root of 1147377287 is about 33872.9580491577. The cubic root of 1147377287 is about 1046.8924863458.

The spelling of 1147377287 in words is "one billion, one hundred forty-seven million, three hundred seventy-seven thousand, two hundred eighty-seven".