1399424897 has 8 divisors (see below), whose sum is σ = 1509111744. Its totient is φ = 1290029328.

The previous prime is 1399424863. The next prime is 1399424941. The reversal of 1399424897 is 7984249931.

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 1399424897 - 2¹⁶ = 1399359361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1399424827) 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, 62783 + ... + 82100.

It is an arithmetic number, because the mean of its divisors is an integer number (188638968).

Almost surely, 2^1399424897 is an apocalyptic number.

It is an amenable number.

1399424897 is a deficient number, since it is larger than the sum of its proper divisors (109686847).

1399424897 is a wasteful number, since it uses less digits than its factorization.

1399424897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145639.

The product of its digits is 3919104, while the sum is 56.

The square root of 1399424897 is about 37408.8879412366. The cubic root of 1399424897 is about 1118.5357398238.

The spelling of 1399424897 in words is "one billion, three hundred ninety-nine million, four hundred twenty-four thousand, eight hundred ninety-seven".