261061039 has 2 divisors, whose sum is σ = 261061040. Its totient is φ = 261061038.

The previous prime is 261061001. The next prime is 261061049. The reversal of 261061039 is 930160162.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 261061039 - 2¹⁷ = 260929967 is a prime.

It is equal to p_14250655 and since 261061039 and 14250655 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 261060998 and 261061016.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (261061049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130530519 + 130530520.

It is an arithmetic number, because the mean of its divisors is an integer number (130530520).

Almost surely, 2^261061039 is an apocalyptic number.

261061039 is a deficient number, since it is larger than the sum of its proper divisors (1).

261061039 is an equidigital number, since it uses as much as digits as its factorization.

261061039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 261061039 is about 16157.3834205913. The cubic root of 261061039 is about 639.1174676675.

The spelling of 261061039 in words is "two hundred sixty-one million, sixty-one thousand, thirty-nine".