77722001 has 8 divisors (see below), whose sum is σ = 91888320. Its totient is φ = 64321488.

The previous prime is 77721997. The next prime is 77722003. The reversal of 77722001 is 10022777.

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

It is not a de Polignac number, because 77722001 - 2² = 77721997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77722003) 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, 191231 + ... + 191636.

It is an arithmetic number, because the mean of its divisors is an integer number (11486040).

Almost surely, 2^77722001 is an apocalyptic number.

It is an amenable number.

77722001 is a deficient number, since it is larger than the sum of its proper divisors (14166319).

77722001 is a wasteful number, since it uses less digits than its factorization.

77722001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382903.

The product of its (nonzero) digits is 1372, while the sum is 26.

The square root of 77722001 is about 8816.0082236804. The cubic root of 77722001 is about 426.7576592905.

Adding to 77722001 its reverse (10022777), we get a palindrome (87744778).

The spelling of 77722001 in words is "seventy-seven million, seven hundred twenty-two thousand, one".