1974435149 has 2 divisors, whose sum is σ = 1974435150. Its totient is φ = 1974435148.

The previous prime is 1974435053. The next prime is 1974435247. The reversal of 1974435149 is 9415344791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1363455625 + 610979524 = 36925^2 + 24718^2 .

It is a cyclic number.

It is not a de Polignac number, because 1974435149 - 2²⁸ = 1705999693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1974435049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 987217574 + 987217575.

It is an arithmetic number, because the mean of its divisors is an integer number (987217575).

Almost surely, 2^1974435149 is an apocalyptic number.

It is an amenable number.

1974435149 is a deficient number, since it is larger than the sum of its proper divisors (1).

1974435149 is an equidigital number, since it uses as much as digits as its factorization.

1974435149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 544320, while the sum is 47.

The square root of 1974435149 is about 44434.6165618654. The cubic root of 1974435149 is about 1254.5297305252.

The spelling of 1974435149 in words is "one billion, nine hundred seventy-four million, four hundred thirty-five thousand, one hundred forty-nine".