1974149284391 has 2 divisors, whose sum is σ = 1974149284392. Its totient is φ = 1974149284390.

The previous prime is 1974149284319. The next prime is 1974149284397. The reversal of 1974149284391 is 1934829414791.

Together with previous prime (1974149284319) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1974149284391 - 2¹⁸ = 1974149022247 is a prime.

It is a super-2 number, since 2×1974149284391² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1974149284397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 987074642195 + 987074642196.

It is an arithmetic number, because the mean of its divisors is an integer number (987074642196).

Almost surely, 2^{1974149284391} is an apocalyptic number.

1974149284391 is a deficient number, since it is larger than the sum of its proper divisors (1).

1974149284391 is an equidigital number, since it uses as much as digits as its factorization.

1974149284391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15676416, while the sum is 62.

The spelling of 1974149284391 in words is "one trillion, nine hundred seventy-four billion, one hundred forty-nine million, two hundred eighty-four thousand, three hundred ninety-one".