261073669 has 2 divisors, whose sum is σ = 261073670. Its totient is φ = 261073668.

The previous prime is 261073651. The next prime is 261073693. The reversal of 261073669 is 966370162.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 221861025 + 39212644 = 14895^2 + 6262^2 .

It is a cyclic number.

It is not a de Polignac number, because 261073669 - 2¹⁷ = 260942597 is a prime.

It is a super-2 number, since 2×261073669² = 136318921290243122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (261073619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130536834 + 130536835.

It is an arithmetic number, because the mean of its divisors is an integer number (130536835).

Almost surely, 2^261073669 is an apocalyptic number.

It is an amenable number.

261073669 is a deficient number, since it is larger than the sum of its proper divisors (1).

261073669 is an equidigital number, since it uses as much as digits as its factorization.

261073669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 40.

The square root of 261073669 is about 16157.7742588514. The cubic root of 261073669 is about 639.1277742270.

The spelling of 261073669 in words is "two hundred sixty-one million, seventy-three thousand, six hundred sixty-nine".