1994449615 has 4 divisors (see below), whose sum is σ = 2393339544. Its totient is φ = 1595559688.

The previous prime is 1994449609. The next prime is 1994449621. The reversal of 1994449615 is 5169444991.

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

It is an interprime number because it is at equal distance from previous prime (1994449609) and next prime (1994449621).

It is a cyclic number.

It is not a de Polignac number, because 1994449615 - 2⁷ = 1994449487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 199444957 + ... + 199444966.

It is an arithmetic number, because the mean of its divisors is an integer number (598334886).

Almost surely, 2^1994449615 is an apocalyptic number.

1994449615 is a deficient number, since it is larger than the sum of its proper divisors (398889929).

1994449615 is an equidigital number, since it uses as much as digits as its factorization.

1994449615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398889928.

The product of its digits is 1399680, while the sum is 52.

The square root of 1994449615 is about 44659.2612455692. The cubic root of 1994449615 is about 1258.7544622439.

The spelling of 1994449615 in words is "one billion, nine hundred ninety-four million, four hundred forty-nine thousand, six hundred fifteen".