1620994127 has 8 divisors (see below), whose sum is σ = 1664005440. Its totient is φ = 1578545280.

The previous prime is 1620994057. The next prime is 1620994129. The reversal of 1620994127 is 7214990261.

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 1620994127 - 2¹⁶ = 1620928591 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620994129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134774 + ... + 146307.

It is an arithmetic number, because the mean of its divisors is an integer number (208000680).

Almost surely, 2^1620994127 is an apocalyptic number.

1620994127 is a deficient number, since it is larger than the sum of its proper divisors (43011313).

1620994127 is an equidigital number, since it uses as much as digits as its factorization.

1620994127 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281233.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 1620994127 is about 40261.5713429071. The cubic root of 1620994127 is about 1174.7004824618.

The spelling of 1620994127 in words is "one billion, six hundred twenty million, nine hundred ninety-four thousand, one hundred twenty-seven".