1970691 has 12 divisors (see below), whose sum is σ = 2792472. Its totient is φ = 1235968.

The previous prime is 1970681. The next prime is 1970711. The reversal of 1970691 is 1960791.

It is not a de Polignac number, because 1970691 - 2⁶ = 1970627 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

1970691 is a lucky number.

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (1970621) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 270 + ... + 2003.

It is an arithmetic number, because the mean of its divisors is an integer number (232706).

2^1970691 is an apocalyptic number.

1970691 is a deficient number, since it is larger than the sum of its proper divisors (821781).

1970691 is a wasteful number, since it uses less digits than its factorization.

1970691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2310 (or 2293 counting only the distinct ones).

The product of its (nonzero) digits is 3402, while the sum is 33.

The square root of 1970691 is about 1403.8130217376. The cubic root of 1970691 is about 125.3736234647.

The spelling of 1970691 in words is "one million, nine hundred seventy thousand, six hundred ninety-one".