1247873949 has 24 divisors (see below), whose sum is σ = 2062412352. Its totient is φ = 712229760.

The previous prime is 1247873927. The next prime is 1247873959. The reversal of 1247873949 is 9493787421.

1247873949 is a `hidden beast` number, since 1 + 247 + 8 + 7 + 394 + 9 = 666.

It is not a de Polignac number, because 1247873949 - 2⁵ = 1247873917 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1247873895 and 1247873904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1247873959) 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, 44262 + ... + 66744.

It is an arithmetic number, because the mean of its divisors is an integer number (85933848).

Almost surely, 2^1247873949 is an apocalyptic number.

It is an amenable number.

1247873949 is a deficient number, since it is larger than the sum of its proper divisors (814538403).

1247873949 is a wasteful number, since it uses less digits than its factorization.

1247873949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23377 (or 23374 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 54.

The square root of 1247873949 is about 35325.2593621052. The cubic root of 1247873949 is about 1076.6062733694.

The spelling of 1247873949 in words is "one billion, two hundred forty-seven million, eight hundred seventy-three thousand, nine hundred forty-nine".