139237191025 has 27 divisors (see below), whose sum is σ = 177534580419. Its totient is φ = 108325486080.

The previous prime is 139237191007. The next prime is 139237191029. The reversal of 139237191025 is 520191732931.

The square root of 139237191025 is 373145.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 13 ways, for example, as 1132793649 + 138104397376 = 33657^2 + 371624^2 .

It is not a de Polignac number, because 139237191025 - 2¹⁵ = 139237158257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139237191029) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 69030817 + ... + 69032833.

Almost surely, 2^139237191025 is an apocalyptic number.

139237191025 is the 373145-th square number.

139237191025 is the 186573-rd centered octagonal number.

It is an amenable number.

139237191025 is a deficient number, since it is larger than the sum of its proper divisors (38297389394).

139237191025 is an frugal number, since it uses more digits than its factorization.

139237191025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4118 (or 2059 counting only the distinct ones).

The product of its (nonzero) digits is 102060, while the sum is 43.

The spelling of 139237191025 in words is "one hundred thirty-nine billion, two hundred thirty-seven million, one hundred ninety-one thousand, twenty-five".