77070381 has 8 divisors (see below), whose sum is σ = 102850080. Its totient is φ = 51335472.

The previous prime is 77070377. The next prime is 77070443. The reversal of 77070381 is 18307077.

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

It is not a de Polignac number, because 77070381 - 2² = 77070377 is a prime.

It is a super-2 number, since 2×77070381² = 11879687254970322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77070311) 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, 6951 + ... + 14228.

It is an arithmetic number, because the mean of its divisors is an integer number (12856260).

Almost surely, 2^77070381 is an apocalyptic number.

It is an amenable number.

77070381 is a deficient number, since it is larger than the sum of its proper divisors (25779699).

77070381 is a wasteful number, since it uses less digits than its factorization.

77070381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22395.

The product of its (nonzero) digits is 8232, while the sum is 33.

The square root of 77070381 is about 8778.9738010772. The cubic root of 77070381 is about 425.5616675396.

The spelling of 77070381 in words is "seventy-seven million, seventy thousand, three hundred eighty-one".