77690613 has 64 divisors (see below), whose sum is σ = 142700544. Its totient is φ = 36288000.

The previous prime is 77690611. The next prime is 77690621. The reversal of 77690613 is 31609677.

It is not a de Polignac number, because 77690613 - 2¹ = 77690611 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77690611) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 122808 + ... + 123438.

It is an arithmetic number, because the mean of its divisors is an integer number (2229696).

Almost surely, 2^77690613 is an apocalyptic number.

It is an amenable number.

77690613 is a deficient number, since it is larger than the sum of its proper divisors (65009931).

77690613 is a wasteful number, since it uses less digits than its factorization.

77690613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 706.

The product of its (nonzero) digits is 47628, while the sum is 39.

The square root of 77690613 is about 8814.2278731605. The cubic root of 77690613 is about 426.7002029168.

The spelling of 77690613 in words is "seventy-seven million, six hundred ninety thousand, six hundred thirteen".