1283797947 has 24 divisors (see below), whose sum is σ = 1864888320. Its totient is φ = 784643760.

The previous prime is 1283797939. The next prime is 1283797951. The reversal of 1283797947 is 7497973821.

It is not a de Polignac number, because 1283797947 - 2³ = 1283797939 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (1283797247) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14454 + ... + 52692.

It is an arithmetic number, because the mean of its divisors is an integer number (77703680).

Almost surely, 2^1283797947 is an apocalyptic number.

1283797947 is a deficient number, since it is larger than the sum of its proper divisors (581090373).

1283797947 is a wasteful number, since it uses less digits than its factorization.

1283797947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38311 (or 38292 counting only the distinct ones).

The product of its digits is 5334336, while the sum is 57.

The square root of 1283797947 is about 35830.1262487310. The cubic root of 1283797947 is about 1086.8398627529.

The spelling of 1283797947 in words is "one billion, two hundred eighty-three million, seven hundred ninety-seven thousand, nine hundred forty-seven".