1392952209 has 32 divisors (see below), whose sum is σ = 2089100160. Its totient is φ = 818150400.

The previous prime is 1392952117. The next prime is 1392952237. The reversal of 1392952209 is 9022592931.

It is not a de Polignac number, because 1392952209 - 2⁹ = 1392951697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1392952259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 326329 + ... + 330569.

It is an arithmetic number, because the mean of its divisors is an integer number (65284380).

Almost surely, 2^1392952209 is an apocalyptic number.

It is an amenable number.

1392952209 is a deficient number, since it is larger than the sum of its proper divisors (696147951).

1392952209 is a wasteful number, since it uses less digits than its factorization.

1392952209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4561.

The product of its (nonzero) digits is 87480, while the sum is 42.

The square root of 1392952209 is about 37322.2749708535. The cubic root of 1392952209 is about 1116.8085722780.

The spelling of 1392952209 in words is "one billion, three hundred ninety-two million, nine hundred fifty-two thousand, two hundred nine".