392878049 has 2 divisors, whose sum is σ = 392878050. Its totient is φ = 392878048.

The previous prime is 392878037. The next prime is 392878081. The reversal of 392878049 is 940878293.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 315701824 + 77176225 = 17768^2 + 8785^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-392878049 is a prime.

It is a super-2 number, since 2×392878049² = 308706322772092802, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 392877988 and 392878006.

It is not a weakly prime, because it can be changed into another prime (392878009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 196439024 + 196439025.

It is an arithmetic number, because the mean of its divisors is an integer number (196439025).

Almost surely, 2^392878049 is an apocalyptic number.

It is an amenable number.

392878049 is a deficient number, since it is larger than the sum of its proper divisors (1).

392878049 is an equidigital number, since it uses as much as digits as its factorization.

392878049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 870912, while the sum is 50.

The square root of 392878049 is about 19821.1515558506. The cubic root of 392878049 is about 732.4071715467.

The spelling of 392878049 in words is "three hundred ninety-two million, eight hundred seventy-eight thousand, forty-nine".