19139701 has 4 divisors (see below), whose sum is σ = 21873952. Its totient is φ = 16405452.

The previous prime is 19139663. The next prime is 19139711. The reversal of 19139701 is 10793191.

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: 10793191 = 29 ⋅372179.

It is not a de Polignac number, because 19139701 - 2¹⁵ = 19106933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19139711) 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, 1367115 + ... + 1367128.

It is an arithmetic number, because the mean of its divisors is an integer number (5468488).

Almost surely, 2^19139701 is an apocalyptic number.

It is an amenable number.

19139701 is a deficient number, since it is larger than the sum of its proper divisors (2734251).

19139701 is an equidigital number, since it uses as much as digits as its factorization.

19139701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2734250.

The product of its (nonzero) digits is 1701, while the sum is 31.

The square root of 19139701 is about 4374.8943987255. The cubic root of 19139701 is about 267.4925656652.

The spelling of 19139701 in words is "nineteen million, one hundred thirty-nine thousand, seven hundred one".