139403450 has 12 divisors (see below), whose sum is σ = 259290510. Its totient is φ = 55761360.

The previous prime is 139403447. The next prime is 139403461. The reversal of 139403450 is 54304931.

It can be written as a sum of positive squares in 3 ways, for example, as 132043081 + 7360369 = 11491^2 + 2713^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1393985 + ... + 1394084.

Almost surely, 2^139403450 is an apocalyptic number.

139403450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

139403450 is a deficient number, since it is larger than the sum of its proper divisors (119887060).

139403450 is a wasteful number, since it uses less digits than its factorization.

139403450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2788081 (or 2788076 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 139403450 is about 11806.9238161343. The cubic root of 139403450 is about 518.5108405483.

The spelling of 139403450 in words is "one hundred thirty-nine million, four hundred three thousand, four hundred fifty".