1994407 has 4 divisors (see below), whose sum is σ = 2018520. Its totient is φ = 1970296.

The previous prime is 1994387. The next prime is 1994413. The reversal of 1994407 is 7044991.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1994407 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 (1994437) 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, 11932 + ... + 12097.

It is an arithmetic number, because the mean of its divisors is an integer number (504630).

2^1994407 is an apocalyptic number.

1994407 is a deficient number, since it is larger than the sum of its proper divisors (24113).

1994407 is an equidigital number, since it uses as much as digits as its factorization.

1994407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24112.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 1994407 is about 1412.2347538565. The cubic root of 1994407 is about 125.8745496996.

It can be divided in two parts, 1994 and 407, that added together give a 4-th power (2401 = 7⁴).

The spelling of 1994407 in words is "one million, nine hundred ninety-four thousand, four hundred seven".