1970191 has 4 divisors (see below), whose sum is σ = 1988712. Its totient is φ = 1951672.

The previous prime is 1970183. The next prime is 1970201. The reversal of 1970191 is 1910791.

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 1970191 - 2³ = 1970183 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 (1970161) 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, 9100 + ... + 9313.

It is an arithmetic number, because the mean of its divisors is an integer number (497178).

2^1970191 is an apocalyptic number.

1970191 is a deficient number, since it is larger than the sum of its proper divisors (18521).

1970191 is a wasteful number, since it uses less digits than its factorization.

1970191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18520.

The product of its (nonzero) digits is 567, while the sum is 28.

The square root of 1970191 is about 1403.6349240454. The cubic root of 1970191 is about 125.3630193815.

The spelling of 1970191 in words is "one million, nine hundred seventy thousand, one hundred ninety-one".