1397929 has 8 divisors (see below), whose sum is σ = 1516032. Its totient is φ = 1281360.

The previous prime is 1397909. The next prime is 1397933. The reversal of 1397929 is 9297931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1397929 - 2¹⁹ = 873641 is a prime.

It is an Ulam number.

It is a Duffinian number.

1397929 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1397891 and 1397900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1397909) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2202 + ... + 2764.

It is an arithmetic number, because the mean of its divisors is an integer number (189504).

2^1397929 is an apocalyptic number.

It is an amenable number.

1397929 is a deficient number, since it is larger than the sum of its proper divisors (118103).

1397929 is a wasteful number, since it uses less digits than its factorization.

1397929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 767.

The product of its digits is 30618, while the sum is 40.

The square root of 1397929 is about 1182.3404754976. The cubic root of 1397929 is about 111.8137049666.

The spelling of 1397929 in words is "one million, three hundred ninety-seven thousand, nine hundred twenty-nine".