373978417 has 4 divisors (see below), whose sum is σ = 374049280. Its totient is φ = 373907556.

The previous prime is 373978369. The next prime is 373978481. The reversal of 373978417 is 714879373.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 714879373 = 13 ⋅54990721.

It is a cyclic number.

It is not a de Polignac number, because 373978417 - 2⁷ = 373978289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (373978117) 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, 26817 + ... + 38302.

It is an arithmetic number, because the mean of its divisors is an integer number (93512320).

Almost surely, 2^373978417 is an apocalyptic number.

It is an amenable number.

373978417 is a deficient number, since it is larger than the sum of its proper divisors (70863).

373978417 is an equidigital number, since it uses as much as digits as its factorization.

373978417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70862.

The product of its digits is 889056, while the sum is 49.

The square root of 373978417 is about 19338.5215825823. The cubic root of 373978417 is about 720.4693551062.

The spelling of 373978417 in words is "three hundred seventy-three million, nine hundred seventy-eight thousand, four hundred seventeen".