261463607 has 4 divisors (see below), whose sum is σ = 267544200. Its totient is φ = 255383016.

The previous prime is 261463603. The next prime is 261463613. The reversal of 261463607 is 706364162.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 261463607 - 2² = 261463603 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261463603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3040232 + ... + 3040317.

It is an arithmetic number, because the mean of its divisors is an integer number (66886050).

Almost surely, 2^261463607 is an apocalyptic number.

261463607 is a deficient number, since it is larger than the sum of its proper divisors (6080593).

261463607 is an equidigital number, since it uses as much as digits as its factorization.

261463607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6080592.

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 261463607 is about 16169.8363318866. The cubic root of 261463607 is about 639.4458150211.

The spelling of 261463607 in words is "two hundred sixty-one million, four hundred sixty-three thousand, six hundred seven".