1642174379 has 4 divisors (see below), whose sum is σ = 1642682760. Its totient is φ = 1641666000.

The previous prime is 1642174363. The next prime is 1642174433. The reversal of 1642174379 is 9734712461.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9734712461 = 8689 ⋅1120349.

It is a cyclic number.

It is not a de Polignac number, because 1642174379 - 2⁴ = 1642174363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1642177379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 249314 + ... + 255815.

It is an arithmetic number, because the mean of its divisors is an integer number (410670690).

Almost surely, 2^1642174379 is an apocalyptic number.

1642174379 is a deficient number, since it is larger than the sum of its proper divisors (508381).

1642174379 is an equidigital number, since it uses as much as digits as its factorization.

1642174379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508380.

The product of its digits is 254016, while the sum is 44.

The square root of 1642174379 is about 40523.7508012277. The cubic root of 1642174379 is about 1179.7946542512.

The spelling of 1642174379 in words is "one billion, six hundred forty-two million, one hundred seventy-four thousand, three hundred seventy-nine".