1398907 has 4 divisors (see below), whose sum is σ = 1409256. Its totient is φ = 1388560.

The previous prime is 1398871. The next prime is 1398911. The reversal of 1398907 is 7098931.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1398907 - 2⁷ = 1398779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1398967) 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, 4969 + ... + 5242.

It is an arithmetic number, because the mean of its divisors is an integer number (352314).

2^1398907 is an apocalyptic number.

1398907 is a deficient number, since it is larger than the sum of its proper divisors (10349).

1398907 is a wasteful number, since it uses less digits than its factorization.

1398907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10348.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 1398907 is about 1182.7539896361. The cubic root of 1398907 is about 111.8397740807.

The spelling of 1398907 in words is "one million, three hundred ninety-eight thousand, nine hundred seven".