610139401 has 9 divisors (see below), whose sum is σ = 648587541. Its totient is φ = 573853632.

The previous prime is 610139389. The next prime is 610139429. The reversal of 610139401 is 104931016.

The square root of 610139401 is 24701.

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

It can be written as a sum of positive squares in 4 ways, for example, as 388129401 + 222010000 = 19701^2 + 14900^2 .

It is not a de Polignac number, because 610139401 - 2¹⁵ = 610106633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (610139441) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 419191 + ... + 420643.

Almost surely, 2^610139401 is an apocalyptic number.

610139401 is the 24701-st square number.

610139401 is the 12351-st centered octagonal number.

It is an amenable number.

610139401 is a deficient number, since it is larger than the sum of its proper divisors (38448140).

610139401 is an frugal number, since it uses more digits than its factorization.

610139401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2940 (or 1470 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 25.

The cubic root of 610139401 is about 848.1572077303.

Multiplying 610139401 by its sum of digits (25), we get a square (15253485025 = 123505²).

The spelling of 610139401 in words is "six hundred ten million, one hundred thirty-nine thousand, four hundred one".