1974966557 has 2 divisors, whose sum is σ = 1974966558. Its totient is φ = 1974966556.

The previous prime is 1974966529. The next prime is 1974966577. The reversal of 1974966557 is 7556694791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1390245796 + 584720761 = 37286^2 + 24181^2 .

It is a cyclic number.

It is not a de Polignac number, because 1974966557 - 2⁶ = 1974966493 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1974966496 and 1974966505.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1974966577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 987483278 + 987483279.

It is an arithmetic number, because the mean of its divisors is an integer number (987483279).

Almost surely, 2^1974966557 is an apocalyptic number.

It is an amenable number.

1974966557 is a deficient number, since it is larger than the sum of its proper divisors (1).

1974966557 is an equidigital number, since it uses as much as digits as its factorization.

1974966557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14288400, while the sum is 59.

The square root of 1974966557 is about 44440.5958218384. The cubic root of 1974966557 is about 1254.6422702786.

The spelling of 1974966557 in words is "one billion, nine hundred seventy-four million, nine hundred sixty-six thousand, five hundred fifty-seven".