139240687401 has 6 divisors (see below), whose sum is σ = 201125437370. Its totient is φ = 92827124928.

The previous prime is 139240687361. The next prime is 139240687447. The reversal of 139240687401 is 104786042931.

It can be written as a sum of positive squares in only one way, i.e., 129185611776 + 10055075625 = 359424^2 + 100275^2 .

It is not a de Polignac number, because 139240687401 - 2¹⁸ = 139240425257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139240687301) 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, 7735593736 + ... + 7735593753.

Almost surely, 2^139240687401 is an apocalyptic number.

It is an amenable number.

139240687401 is a deficient number, since it is larger than the sum of its proper divisors (61884749969).

139240687401 is a wasteful number, since it uses less digits than its factorization.

139240687401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15471187495 (or 15471187492 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The spelling of 139240687401 in words is "one hundred thirty-nine billion, two hundred forty million, six hundred eighty-seven thousand, four hundred one".