139143850 has 12 divisors (see below), whose sum is σ = 258807654. Its totient is φ = 55657520.

The previous prime is 139143847. The next prime is 139143853. The reversal of 139143850 is 58341931.

It is an interprime number because it is at equal distance from previous prime (139143847) and next prime (139143853).

It can be written as a sum of positive squares in 3 ways, for example, as 119968209 + 19175641 = 10953^2 + 4379^2 .

It is a super-2 number, since 2×139143850² = 38722021985645000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (139143853) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1391389 + ... + 1391488.

Almost surely, 2^139143850 is an apocalyptic number.

139143850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

139143850 is a deficient number, since it is larger than the sum of its proper divisors (119663804).

139143850 is a wasteful number, since it uses less digits than its factorization.

139143850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2782889 (or 2782884 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 139143850 is about 11795.9251438791. The cubic root of 139143850 is about 518.1887799973.

The spelling of 139143850 in words is "one hundred thirty-nine million, one hundred forty-three thousand, eight hundred fifty".