699309378 has 12 divisors (see below), whose sum is σ = 1515170358. Its totient is φ = 233103120.

The previous prime is 699309367. The next prime is 699309389. The reversal of 699309378 is 873903996.

699309378 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (699309367) and next prime (699309389).

It can be written as a sum of positive squares in only one way, i.e., 452285289 + 247024089 = 21267^2 + 15717^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19425243 + ... + 19425278.

Almost surely, 2^699309378 is an apocalyptic number.

699309378 is an abundant number, since it is smaller than the sum of its proper divisors (815860980).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

699309378 is a wasteful number, since it uses less digits than its factorization.

699309378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38850529 (or 38850526 counting only the distinct ones).

The product of its (nonzero) digits is 2204496, while the sum is 54.

The square root of 699309378 is about 26444.4583608740. The cubic root of 699309378 is about 887.6119027846.

The spelling of 699309378 in words is "six hundred ninety-nine million, three hundred nine thousand, three hundred seventy-eight".