1974240647 has 2 divisors, whose sum is σ = 1974240648. Its totient is φ = 1974240646.

The previous prime is 1974240643. The next prime is 1974240649. The reversal of 1974240647 is 7460424791.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1974240647 - 2² = 1974240643 is a prime.

It is a super-2 number, since 2×1974240647² = 7795252264533957218, which contains 22 as substring.

Together with 1974240649, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1974240598 and 1974240607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1974240643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 987120323 + 987120324.

It is an arithmetic number, because the mean of its divisors is an integer number (987120324).

Almost surely, 2^1974240647 is an apocalyptic number.

1974240647 is a deficient number, since it is larger than the sum of its proper divisors (1).

1974240647 is an equidigital number, since it uses as much as digits as its factorization.

1974240647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 338688, while the sum is 44.

The square root of 1974240647 is about 44432.4278764958. The cubic root of 1974240647 is about 1254.4885345145.

The spelling of 1974240647 in words is "one billion, nine hundred seventy-four million, two hundred forty thousand, six hundred forty-seven".