100523890 has 16 divisors (see below), whose sum is σ = 191587032. Its totient is φ = 37844224.

The previous prime is 100523867. The next prime is 100523897. The reversal of 100523890 is 98325001.

It can be written as a sum of positive squares in 4 ways, for example, as 99062209 + 1461681 = 9953^2 + 1209^2 .

It is not an unprimeable number, because it can be changed into a prime (100523897) 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, 295489 + ... + 295828.

Almost surely, 2^100523890 is an apocalyptic number.

100523890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

100523890 is a deficient number, since it is larger than the sum of its proper divisors (91063142).

100523890 is a wasteful number, since it uses less digits than its factorization.

100523890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 591341.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 100523890 is about 10026.1602819823. The cubic root of 100523890 is about 464.9680326426.

Adding to 100523890 its reverse (98325001), we get a palindrome (198848891).

The spelling of 100523890 in words is "one hundred million, five hundred twenty-three thousand, eight hundred ninety".