139820667 has 12 divisors (see below), whose sum is σ = 216864936. Its totient is φ = 79897440.

The previous prime is 139820651. The next prime is 139820683. The reversal of 139820667 is 766028931.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (139820651) and next prime (139820683).

It is not a de Polignac number, because 139820667 - 2⁴ = 139820651 is a prime.

It is not an unprimeable number, because it can be changed into a prime (139820617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 475434 + ... + 475727.

It is an arithmetic number, because the mean of its divisors is an integer number (18072078).

Almost surely, 2^139820667 is an apocalyptic number.

139820667 is a deficient number, since it is larger than the sum of its proper divisors (77044269).

139820667 is an equidigital number, since it uses as much as digits as its factorization.

139820667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 951178 (or 951171 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 139820667 is about 11824.5789354209. The cubic root of 139820667 is about 519.0276046069.

The spelling of 139820667 in words is "one hundred thirty-nine million, eight hundred twenty thousand, six hundred sixty-seven".