1999137 has 16 divisors (see below), whose sum is σ = 3179520. Its totient is φ = 1092432.

The previous prime is 1999121. The next prime is 1999163. The reversal of 1999137 is 7319991.

It is not a de Polignac number, because 1999137 - 2⁴ = 1999121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1999095 and 1999104.

It is not an unprimeable number, because it can be changed into a prime (1999177) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1587 + ... + 2552.

It is an arithmetic number, because the mean of its divisors is an integer number (198720).

2^1999137 is an apocalyptic number.

It is an amenable number.

1999137 is a deficient number, since it is larger than the sum of its proper divisors (1180383).

1999137 is a wasteful number, since it uses less digits than its factorization.

1999137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4172.

The product of its digits is 15309, while the sum is 39.

The square root of 1999137 is about 1413.9084128755. The cubic root of 1999137 is about 125.9739805179.

The spelling of 1999137 in words is "one million, nine hundred ninety-nine thousand, one hundred thirty-seven".