139764243 has 8 divisors (see below), whose sum is σ = 186861568. Its totient is φ = 92921544.

The previous prime is 139764239. The next prime is 139764257. The reversal of 139764243 is 342467931.

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

It is not a de Polignac number, because 139764243 - 2² = 139764239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139764263) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62371 + ... + 64572.

It is an arithmetic number, because the mean of its divisors is an integer number (23357696).

Almost surely, 2^139764243 is an apocalyptic number.

139764243 is a deficient number, since it is larger than the sum of its proper divisors (47097325).

139764243 is a wasteful number, since it uses less digits than its factorization.

139764243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127313.

The product of its digits is 108864, while the sum is 39.

The square root of 139764243 is about 11822.1928169016. The cubic root of 139764243 is about 518.9577781298.

The spelling of 139764243 in words is "one hundred thirty-nine million, seven hundred sixty-four thousand, two hundred forty-three".