19973001 has 4 divisors (see below), whose sum is σ = 26630672. Its totient is φ = 13315332.

The previous prime is 19972987. The next prime is 19973029. The reversal of 19973001 is 10037991.

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.

It is not a de Polignac number, because 19973001 - 2¹¹ = 19970953 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19973001.

It is not an unprimeable number, because it can be changed into a prime (19973071) 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, 3328831 + ... + 3328836.

It is an arithmetic number, because the mean of its divisors is an integer number (6657668).

Almost surely, 2^19973001 is an apocalyptic number.

It is an amenable number.

19973001 is a deficient number, since it is larger than the sum of its proper divisors (6657671).

19973001 is an equidigital number, since it uses as much as digits as its factorization.

19973001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6657670.

The product of its (nonzero) digits is 1701, while the sum is 30.

The square root of 19973001 is about 4469.1163556121. The cubic root of 19973001 is about 271.3195623866.

The spelling of 19973001 in words is "nineteen million, nine hundred seventy-three thousand, one".