1634340387 has 8 divisors (see below), whose sum is σ = 2206704640. Its totient is φ = 1075768200.

The previous prime is 1634340361. The next prime is 1634340503. The reversal of 1634340387 is 7830434361.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1634340387 - 2¹¹ = 1634338339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1634340317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3447739 + ... + 3448212.

It is an arithmetic number, because the mean of its divisors is an integer number (275838080).

Almost surely, 2^1634340387 is an apocalyptic number.

1634340387 is a deficient number, since it is larger than the sum of its proper divisors (572364253).

1634340387 is an equidigital number, since it uses as much as digits as its factorization.

1634340387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6896033.

The product of its (nonzero) digits is 145152, while the sum is 39.

The square root of 1634340387 is about 40426.9759813914. The cubic root of 1634340387 is about 1177.9155931328.

The spelling of 1634340387 in words is "one billion, six hundred thirty-four million, three hundred forty thousand, three hundred eighty-seven".