1994627137 has 4 divisors (see below), whose sum is σ = 2081350080. Its totient is φ = 1907904196.

The previous prime is 1994627029. The next prime is 1994627161. The reversal of 1994627137 is 7317264991.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7317264991 = 211 ⋅34678981.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1994627137 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1994627177) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43361437 + ... + 43361482.

It is an arithmetic number, because the mean of its divisors is an integer number (520337520).

Almost surely, 2^1994627137 is an apocalyptic number.

It is an amenable number.

1994627137 is a deficient number, since it is larger than the sum of its proper divisors (86722943).

1994627137 is an equidigital number, since it uses as much as digits as its factorization.

1994627137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86722942.

The product of its digits is 571536, while the sum is 49.

The square root of 1994627137 is about 44661.2487174284. The cubic root of 1994627137 is about 1258.7918075477.

The spelling of 1994627137 in words is "one billion, nine hundred ninety-four million, six hundred twenty-seven thousand, one hundred thirty-seven".