139650691 has 16 divisors (see below), whose sum is σ = 149543680. Its totient is φ = 130170240.

The previous prime is 139650673. The next prime is 139650743. The reversal of 139650691 is 196056931.

It is not a de Polignac number, because 139650691 - 2⁹ = 139650179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139650661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124465 + ... + 125581.

It is an arithmetic number, because the mean of its divisors is an integer number (9346480).

Almost surely, 2^139650691 is an apocalyptic number.

139650691 is a deficient number, since it is larger than the sum of its proper divisors (9892989).

139650691 is a wasteful number, since it uses less digits than its factorization.

139650691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1294.

The product of its (nonzero) digits is 43740, while the sum is 40.

The square root of 139650691 is about 11817.3893479059. The cubic root of 139650691 is about 518.8171969661.

The spelling of 139650691 in words is "one hundred thirty-nine million, six hundred fifty thousand, six hundred ninety-one".