1969397 has 4 divisors (see below), whose sum is σ = 1976640. Its totient is φ = 1962156.

The previous prime is 1969381. The next prime is 1969403. The reversal of 1969397 is 7939691.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 1969397 - 2⁴ = 1969381 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 (1969307) 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, 3197 + ... + 3762.

It is an arithmetic number, because the mean of its divisors is an integer number (494160).

2^1969397 is an apocalyptic number.

It is an amenable number.

1969397 is a deficient number, since it is larger than the sum of its proper divisors (7243).

1969397 is an equidigital number, since it uses as much as digits as its factorization.

1969397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7242.

The product of its digits is 91854, while the sum is 44.

The square root of 1969397 is about 1403.3520584657. The cubic root of 1969397 is about 125.3461764101.

The spelling of 1969397 in words is "one million, nine hundred sixty-nine thousand, three hundred ninety-seven".