100073945 has 4 divisors (see below), whose sum is σ = 120088740. Its totient is φ = 80059152.

The previous prime is 100073933. The next prime is 100073957. The reversal of 100073945 is 549370001.

100073945 is nontrivially palindromic in base 14.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 549370001 = 3547 ⋅154883.

It is an interprime number because it is at equal distance from previous prime (100073933) and next prime (100073957).

It can be written as a sum of positive squares in 2 ways, for example, as 18731584 + 81342361 = 4328^2 + 9019^2 .

It is a cyclic number.

It is not a de Polignac number, because 100073945 - 2⁴ = 100073929 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10007390 + ... + 10007399.

It is an arithmetic number, because the mean of its divisors is an integer number (30022185).

Almost surely, 2^100073945 is an apocalyptic number.

It is an amenable number.

100073945 is a deficient number, since it is larger than the sum of its proper divisors (20014795).

100073945 is an equidigital number, since it uses as much as digits as its factorization.

100073945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20014794.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 100073945 is about 10003.6965667697. The cubic root of 100073945 is about 464.2732626021.

The spelling of 100073945 in words is "one hundred million, seventy-three thousand, nine hundred forty-five".