77430261 has 8 divisors (see below), whose sum is σ = 106800480. Its totient is φ = 49840112.

The previous prime is 77430251. The next prime is 77430277. The reversal of 77430261 is 16203477.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 77430261 - 2⁹ = 77429749 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77430211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 444915 + ... + 445088.

It is an arithmetic number, because the mean of its divisors is an integer number (13350060).

Almost surely, 2^77430261 is an apocalyptic number.

It is an amenable number.

77430261 is a deficient number, since it is larger than the sum of its proper divisors (29370219).

77430261 is a wasteful number, since it uses less digits than its factorization.

77430261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 890035.

The product of its (nonzero) digits is 7056, while the sum is 30.

The square root of 77430261 is about 8799.4466303285. The cubic root of 77430261 is about 426.2230256721.

The spelling of 77430261 in words is "seventy-seven million, four hundred thirty thousand, two hundred sixty-one".