139448951 has 4 divisors (see below), whose sum is σ = 140385000. Its totient is φ = 138512904.

The previous prime is 139448941. The next prime is 139448963. The reversal of 139448951 is 159844931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 159844931 = 17 ⋅9402643.

It is a cyclic number.

It is not a de Polignac number, because 139448951 - 2⁶ = 139448887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139448941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 467801 + ... + 468098.

It is an arithmetic number, because the mean of its divisors is an integer number (35096250).

Almost surely, 2^139448951 is an apocalyptic number.

139448951 is a deficient number, since it is larger than the sum of its proper divisors (936049).

139448951 is an equidigital number, since it uses as much as digits as its factorization.

139448951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 936048.

The product of its digits is 155520, while the sum is 44.

The square root of 139448951 is about 11808.8505367796. The cubic root of 139448951 is about 518.5672480364.

The spelling of 139448951 in words is "one hundred thirty-nine million, four hundred forty-eight thousand, nine hundred fifty-one".