1921434137 has 8 divisors (see below), whose sum is σ = 2196734400. Its totient is φ = 1646336304.

The previous prime is 1921434133. The next prime is 1921434139. The reversal of 1921434137 is 7314341291.

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

It is a cyclic number.

It is not a de Polignac number, because 1921434137 - 2² = 1921434133 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1921434097 and 1921434106.

It is not an unprimeable number, because it can be changed into a prime (1921434133) 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, 29687 + ... + 68732.

It is an arithmetic number, because the mean of its divisors is an integer number (274591800).

Almost surely, 2^1921434137 is an apocalyptic number.

It is an amenable number.

1921434137 is a deficient number, since it is larger than the sum of its proper divisors (275300263).

1921434137 is an equidigital number, since it uses as much as digits as its factorization.

1921434137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101215.

The product of its digits is 18144, while the sum is 35.

The square root of 1921434137 is about 43834.1663203488. The cubic root of 1921434137 is about 1243.2023834962.

The spelling of 1921434137 in words is "one billion, nine hundred twenty-one million, four hundred thirty-four thousand, one hundred thirty-seven".