100640061 has 6 divisors (see below), whose sum is σ = 145368990. Its totient is φ = 67093368.

The previous prime is 100640053. The next prime is 100640069. The reversal of 100640061 is 160046001.

It is an interprime number because it is at equal distance from previous prime (100640053) and next prime (100640069).

It can be written as a sum of positive squares in only one way, i.e., 88172100 + 12467961 = 9390^2 + 3531^2 .

It is not a de Polignac number, because 100640061 - 2³ = 100640053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100640069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5591106 + ... + 5591123.

It is an arithmetic number, because the mean of its divisors is an integer number (24228165).

Almost surely, 2^100640061 is an apocalyptic number.

It is an amenable number.

100640061 is a deficient number, since it is larger than the sum of its proper divisors (44728929).

100640061 is a wasteful number, since it uses less digits than its factorization.

100640061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11182235 (or 11182232 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 100640061 is about 10031.9520034737. The cubic root of 100640061 is about 465.1470779979.

Adding to 100640061 its reverse (160046001), we get a palindrome (260686062).

The spelling of 100640061 in words is "one hundred million, six hundred forty thousand, sixty-one".