1974647879 has 2 divisors, whose sum is σ = 1974647880. Its totient is φ = 1974647878.

The previous prime is 1974647837. The next prime is 1974647887. The reversal of 1974647879 is 9787464791.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1974647879 - 2²⁸ = 1706212423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1974644879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 987323939 + 987323940.

It is an arithmetic number, because the mean of its divisors is an integer number (987323940).

Almost surely, 2^1974647879 is an apocalyptic number.

1974647879 is a deficient number, since it is larger than the sum of its proper divisors (1).

1974647879 is an equidigital number, since it uses as much as digits as its factorization.

1974647879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21337344, while the sum is 62.

The square root of 1974647879 is about 44437.0102392139. The cubic root of 1974647879 is about 1254.5747841744.

The spelling of 1974647879 in words is "one billion, nine hundred seventy-four million, six hundred forty-seven thousand, eight hundred seventy-nine".