90070100 has 18 divisors (see below), whose sum is σ = 195452334. Its totient is φ = 36028000.

The previous prime is 90070091. The next prime is 90070109. The reversal of 90070100 is 107009.

It is an interprime number because it is at equal distance from previous prime (90070091) and next prime (90070109).

It can be written as a sum of positive squares in 3 ways, for example, as 31516996 + 58553104 = 5614^2 + 7652^2 .

It is a super-2 number, since 2×90070100² = 16225245828020000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90070109) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 450251 + ... + 450450.

It is an arithmetic number, because the mean of its divisors is an integer number (10858463).

Almost surely, 2^90070100 is an apocalyptic number.

It is an amenable number.

90070100 is an abundant number, since it is smaller than the sum of its proper divisors (105382234).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

90070100 is a wasteful number, since it uses less digits than its factorization.

90070100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 900715 (or 900708 counting only the distinct ones).

The product of its (nonzero) digits is 63, while the sum is 17.

The square root of 90070100 is about 9490.5268557652. The cubic root of 90070100 is about 448.2567950062.

Adding to 90070100 its reverse (107009), we get a palindrome (90177109).

The spelling of 90070100 in words is "ninety million, seventy thousand, one hundred".