30378997 has 4 divisors (see below), whose sum is σ = 33140736. Its totient is φ = 27617260.

The previous prime is 30378947. The next prime is 30379001. The reversal of 30378997 is 79987303.

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.

It is not a de Polignac number, because 30378997 - 2⁷ = 30378869 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 (30378937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1380853 + ... + 1380874.

It is an arithmetic number, because the mean of its divisors is an integer number (8285184).

Almost surely, 2^30378997 is an apocalyptic number.

It is an amenable number.

30378997 is a deficient number, since it is larger than the sum of its proper divisors (2761739).

30378997 is a wasteful number, since it uses less digits than its factorization.

30378997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2761738.

The product of its (nonzero) digits is 285768, while the sum is 46.

The square root of 30378997 is about 5511.7145245377. The cubic root of 30378997 is about 312.0262586107.

It can be divided in two parts, 30378 and 997, that added together give a triangular number (31375 = T₂₅₀).

The spelling of 30378997 in words is "thirty million, three hundred seventy-eight thousand, nine hundred ninety-seven".