77242077 has 12 divisors (see below), whose sum is σ = 121714944. Its totient is φ = 46813320.

The previous prime is 77242057. The next prime is 77242093. The reversal of 77242077 is 77024277.

It is not a de Polignac number, because 77242077 - 2⁷ = 77241949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77242007) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 390013 + ... + 390210.

It is an arithmetic number, because the mean of its divisors is an integer number (10142912).

Almost surely, 2^77242077 is an apocalyptic number.

It is an amenable number.

77242077 is a deficient number, since it is larger than the sum of its proper divisors (44472867).

77242077 is a wasteful number, since it uses less digits than its factorization.

77242077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 780240 (or 780237 counting only the distinct ones).

The product of its (nonzero) digits is 38416, while the sum is 36.

The square root of 77242077 is about 8788.7471803437. The cubic root of 77242077 is about 425.8774526825.

It can be divided in two parts, 7724 and 2077, that added together give a square (9801 = 99²).

The spelling of 77242077 in words is "seventy-seven million, two hundred forty-two thousand, seventy-seven".