2739421647 has 32 divisors (see below), whose sum is σ = 4243484160. Its totient is φ = 1743318720.

The previous prime is 2739421637. The next prime is 2739421661. The reversal of 2739421647 is 7461249372.

2739421647 is a `hidden beast` number, since 2 + 7 + 394 + 216 + 47 = 666.

It is not a de Polignac number, because 2739421647 - 2⁴ = 2739421631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2739421627) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 319308 + ... + 327774.

It is an arithmetic number, because the mean of its divisors is an integer number (132608880).

Almost surely, 2^2739421647 is an apocalyptic number.

2739421647 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

2739421647 is a deficient number, since it is larger than the sum of its proper divisors (1504062513).

2739421647 is a wasteful number, since it uses less digits than its factorization.

2739421647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9020 (or 9014 counting only the distinct ones).

The product of its digits is 508032, while the sum is 45.

The square root of 2739421647 is about 52339.4845885972. The cubic root of 2739421647 is about 1399.2209350877.

The spelling of 2739421647 in words is "two billion, seven hundred thirty-nine million, four hundred twenty-one thousand, six hundred forty-seven".