19103997 has 16 divisors (see below), whose sum is σ = 28435968. Its totient is φ = 11308080.

The previous prime is 19103989. The next prime is 19103999. The reversal of 19103997 is 79930191.

It is not a de Polignac number, because 19103997 - 2³ = 19103989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19103999) 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, 5313 + ... + 8150.

It is an arithmetic number, because the mean of its divisors is an integer number (1777248).

Almost surely, 2^19103997 is an apocalyptic number.

It is an amenable number.

19103997 is a deficient number, since it is larger than the sum of its proper divisors (9331971).

19103997 is a wasteful number, since it uses less digits than its factorization.

19103997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13520.

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

The square root of 19103997 is about 4370.8119383016. The cubic root of 19103997 is about 267.3261315188.

It can be divided in two parts, 19103 and 997, that added together give a triangular number (20100 = T₂₀₀).

The spelling of 19103997 in words is "nineteen million, one hundred three thousand, nine hundred ninety-seven".