139263249 has 8 divisors (see below), whose sum is σ = 192087360. Its totient is φ = 89640656.

The previous prime is 139263211. The next prime is 139263251. The reversal of 139263249 is 942362931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 139263249 - 2¹³ = 139255057 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (139263259) 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 7 ways as a sum of consecutive naturals, for example, 800277 + ... + 800450.

It is an arithmetic number, because the mean of its divisors is an integer number (24010920).

Almost surely, 2^139263249 is an apocalyptic number.

It is an amenable number.

139263249 is a deficient number, since it is larger than the sum of its proper divisors (52824111).

139263249 is a wasteful number, since it uses less digits than its factorization.

139263249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1600759.

The product of its digits is 69984, while the sum is 39.

The square root of 139263249 is about 11800.9850860002. The cubic root of 139263249 is about 518.3369564669.

The spelling of 139263249 in words is "one hundred thirty-nine million, two hundred sixty-three thousand, two hundred forty-nine".