1970917 has 4 divisors (see below), whose sum is σ = 2122540. Its totient is φ = 1819296.

The previous prime is 1970873. The next prime is 1970921. The reversal of 1970917 is 7190791.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7190791 = 31 ⋅231961.

It can be written as a sum of positive squares in 2 ways, for example, as 784996 + 1185921 = 886^2 + 1089^2 .

It is a cyclic number.

It is not a de Polignac number, because 1970917 - 2¹⁵ = 1938149 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 (1970957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75792 + ... + 75817.

It is an arithmetic number, because the mean of its divisors is an integer number (530635).

2^1970917 is an apocalyptic number.

It is an amenable number.

1970917 is a deficient number, since it is larger than the sum of its proper divisors (151623).

1970917 is a wasteful number, since it uses less digits than its factorization.

1970917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151622.

The product of its (nonzero) digits is 3969, while the sum is 34.

The square root of 1970917 is about 1403.8935144804. The cubic root of 1970917 is about 125.3784159218.

The spelling of 1970917 in words is "one million, nine hundred seventy thousand, nine hundred seventeen".