1994415415 has 4 divisors (see below), whose sum is σ = 2393298504. Its totient is φ = 1595532328.

The previous prime is 1994415373. The next prime is 1994415443. The reversal of 1994415415 is 5145144991.

It is a happy number.

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 1994415415 - 2²⁵ = 1960860983 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, 199441537 + ... + 199441546.

It is an arithmetic number, because the mean of its divisors is an integer number (598324626).

Almost surely, 2^1994415415 is an apocalyptic number.

1994415415 is a deficient number, since it is larger than the sum of its proper divisors (398883089).

1994415415 is an equidigital number, since it uses as much as digits as its factorization.

1994415415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398883088.

The product of its digits is 129600, while the sum is 43.

The square root of 1994415415 is about 44658.8783446248. The cubic root of 1994415415 is about 1258.7472673352.

The spelling of 1994415415 in words is "one billion, nine hundred ninety-four million, four hundred fifteen thousand, four hundred fifteen".