139409553 has 16 divisors (see below), whose sum is σ = 191290176. Its totient is φ = 90255360.

The previous prime is 139409533. The next prime is 139409579. The reversal of 139409553 is 355904931.

It is not a de Polignac number, because 139409553 - 2⁵ = 139409521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (139409533) 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, 25425 + ... + 30417.

It is an arithmetic number, because the mean of its divisors is an integer number (11955636).

Almost surely, 2^139409553 is an apocalyptic number.

It is an amenable number.

139409553 is a deficient number, since it is larger than the sum of its proper divisors (51880623).

139409553 is a wasteful number, since it uses less digits than its factorization.

139409553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5264.

The product of its (nonzero) digits is 72900, while the sum is 39.

The square root of 139409553 is about 11807.1822633514. The cubic root of 139409553 is about 518.5184071365.

The spelling of 139409553 in words is "one hundred thirty-nine million, four hundred nine thousand, five hundred fifty-three".