1874269981 has 2 divisors, whose sum is σ = 1874269982. Its totient is φ = 1874269980.

The previous prime is 1874269973. The next prime is 1874270033. The reversal of 1874269981 is 1899624781.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1863648900 + 10621081 = 43170^2 + 3259^2 .

It is a cyclic number.

It is not a de Polignac number, because 1874269981 - 2³ = 1874269973 is a prime.

It is a super-2 number, since 2×1874269981² = 7025775923355480722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1874269921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 937134990 + 937134991.

It is an arithmetic number, because the mean of its divisors is an integer number (937134991).

Almost surely, 2^1874269981 is an apocalyptic number.

It is an amenable number.

1874269981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1874269981 is an equidigital number, since it uses as much as digits as its factorization.

1874269981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1741824, while the sum is 55.

The square root of 1874269981 is about 43292.8398352430. The cubic root of 1874269981 is about 1232.9459824649.

The spelling of 1874269981 in words is "one billion, eight hundred seventy-four million, two hundred sixty-nine thousand, nine hundred eighty-one".