100777970 has 16 divisors (see below), whose sum is σ = 181920600. Its totient is φ = 40195584.

The previous prime is 100777951. The next prime is 100777979. The reversal of 100777970 is 79777001.

It can be written as a sum of positive squares in 4 ways, for example, as 60949249 + 39828721 = 7807^2 + 6311^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (100777979) 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, 10745 + ... + 17804.

Almost surely, 2^100777970 is an apocalyptic number.

100777970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

100777970 is a deficient number, since it is larger than the sum of its proper divisors (81142630).

100777970 is a wasteful number, since it uses less digits than its factorization.

100777970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28909.

The product of its (nonzero) digits is 21609, while the sum is 38.

The square root of 100777970 is about 10038.8231381970. The cubic root of 100777970 is about 465.3594476678.

The spelling of 100777970 in words is "one hundred million, seven hundred seventy-seven thousand, nine hundred seventy".