77690147 has 4 divisors (see below), whose sum is σ = 78563160. Its totient is φ = 76817136.

The previous prime is 77690143. The next prime is 77690191. The reversal of 77690147 is 74109677.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74109677 = 89 ⋅832693.

It is a cyclic number.

It is not a de Polignac number, because 77690147 - 2² = 77690143 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77690143) 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, 436373 + ... + 436550.

It is an arithmetic number, because the mean of its divisors is an integer number (19640790).

Almost surely, 2^77690147 is an apocalyptic number.

77690147 is a deficient number, since it is larger than the sum of its proper divisors (873013).

77690147 is an equidigital number, since it uses as much as digits as its factorization.

77690147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 873012.

The product of its (nonzero) digits is 74088, while the sum is 41.

The square root of 77690147 is about 8814.2014385876. The cubic root of 77690147 is about 426.6993497777.

The spelling of 77690147 in words is "seventy-seven million, six hundred ninety thousand, one hundred forty-seven".