139400985 has 8 divisors (see below), whose sum is σ = 223041600. Its totient is φ = 74347184.

The previous prime is 139400977. The next prime is 139400993. The reversal of 139400985 is 589004931.

It is an interprime number because it is at equal distance from previous prime (139400977) and next prime (139400993).

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 139400985 - 2³ = 139400977 is a prime.

It is an unprimeable number.

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, 4646685 + ... + 4646714.

It is an arithmetic number, because the mean of its divisors is an integer number (27880200).

Almost surely, 2^139400985 is an apocalyptic number.

139400985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

139400985 is a deficient number, since it is larger than the sum of its proper divisors (83640615).

139400985 is an equidigital number, since it uses as much as digits as its factorization.

139400985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9293407.

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 139400985 is about 11806.8194277714. The cubic root of 139400985 is about 518.5077843429.

The spelling of 139400985 in words is "one hundred thirty-nine million, four hundred thousand, nine hundred eighty-five".