19072939 has 4 divisors (see below), whose sum is σ = 19133424. Its totient is φ = 19012456.

The previous prime is 19072927. The next prime is 19072969. The reversal of 19072939 is 93927091.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 19072939 - 2⁷ = 19072811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19072909) 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, 29767 + ... + 30400.

It is an arithmetic number, because the mean of its divisors is an integer number (4783356).

Almost surely, 2^19072939 is an apocalyptic number.

19072939 is a deficient number, since it is larger than the sum of its proper divisors (60485).

19072939 is an equidigital number, since it uses as much as digits as its factorization.

19072939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60484.

The product of its (nonzero) digits is 30618, while the sum is 40.

The square root of 19072939 is about 4367.2576063246. The cubic root of 19072939 is about 267.1811859639.

The spelling of 19072939 in words is "nineteen million, seventy-two thousand, nine hundred thirty-nine".