139472643 has 8 divisors (see below), whose sum is σ = 186044688. Its totient is φ = 92941184.

The previous prime is 139472633. The next prime is 139472653. The reversal of 139472643 is 346274931.

It is an interprime number because it is at equal distance from previous prime (139472633) and next prime (139472653).

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 139472643 - 2⁶ = 139472579 is a prime.

It is not an unprimeable number, because it can be changed into a prime (139472603) 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, 930 + ... + 16727.

It is an arithmetic number, because the mean of its divisors is an integer number (23255586).

Almost surely, 2^139472643 is an apocalyptic number.

139472643 is a deficient number, since it is larger than the sum of its proper divisors (46572045).

139472643 is a wasteful number, since it uses less digits than its factorization.

139472643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20293.

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

The square root of 139472643 is about 11809.8536400753. The cubic root of 139472643 is about 518.5966140982.

The spelling of 139472643 in words is "one hundred thirty-nine million, four hundred seventy-two thousand, six hundred forty-three".