139749001 has 8 divisors (see below), whose sum is σ = 163111680. Its totient is φ = 117235968.

The previous prime is 139748929. The next prime is 139749031. The reversal of 139749001 is 100947931.

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 139749001 - 2⁹ = 139748489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139749031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 212056 + ... + 212713.

It is an arithmetic number, because the mean of its divisors is an integer number (20388960).

Almost surely, 2^139749001 is an apocalyptic number.

It is an amenable number.

139749001 is a deficient number, since it is larger than the sum of its proper divisors (23362679).

139749001 is an equidigital number, since it uses as much as digits as its factorization.

139749001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424823.

The product of its (nonzero) digits is 6804, while the sum is 34.

The square root of 139749001 is about 11821.5481642634. The cubic root of 139749001 is about 518.9389124508.

The spelling of 139749001 in words is "one hundred thirty-nine million, seven hundred forty-nine thousand, one".