1974738061 has 2 divisors, whose sum is σ = 1974738062. Its totient is φ = 1974738060.

The previous prime is 1974738049. The next prime is 1974738079. The reversal of 1974738061 is 1608374791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1590813225 + 383924836 = 39885^2 + 19594^2 .

It is an emirp because it is prime and its reverse (1608374791) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1974738061 - 2²³ = 1966349453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1974738011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 987369030 + 987369031.

It is an arithmetic number, because the mean of its divisors is an integer number (987369031).

Almost surely, 2^1974738061 is an apocalyptic number.

It is an amenable number.

1974738061 is a deficient number, since it is larger than the sum of its proper divisors (1).

1974738061 is an equidigital number, since it uses as much as digits as its factorization.

1974738061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 254016, while the sum is 46.

The square root of 1974738061 is about 44438.0249448600. The cubic root of 1974738061 is about 1254.5938826581.

The spelling of 1974738061 in words is "one billion, nine hundred seventy-four million, seven hundred thirty-eight thousand, sixty-one".