77940001 has 4 divisors (see below), whose sum is σ = 78375600. Its totient is φ = 77504404.

The previous prime is 77939989. The next prime is 77940011. The reversal of 77940001 is 10004977.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 77940001 - 2⁵ = 77939969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77940011) 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, 217531 + ... + 217888.

It is an arithmetic number, because the mean of its divisors is an integer number (19593900).

Almost surely, 2^77940001 is an apocalyptic number.

It is an amenable number.

77940001 is a deficient number, since it is larger than the sum of its proper divisors (435599).

77940001 is a wasteful number, since it uses less digits than its factorization.

77940001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435598.

The product of its (nonzero) digits is 1764, while the sum is 28.

The square root of 77940001 is about 8828.3634383729. The cubic root of 77940001 is about 427.1562865427.

Adding to 77940001 its reverse (10004977), we get a palindrome (87944978).

The spelling of 77940001 in words is "seventy-seven million, nine hundred forty thousand, one".