745900109 has 16 divisors (see below), whose sum is σ = 798174000. Its totient is φ = 694600704.

The previous prime is 745900091. The next prime is 745900123. The reversal of 745900109 is 901009547.

It can be written as a sum of positive squares in 8 ways, for example, as 16630084 + 729270025 = 4078^2 + 27005^2 .

It is a cyclic number.

It is not a de Polignac number, because 745900109 - 2¹² = 745896013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (745900139) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 984959 + ... + 985715.

It is an arithmetic number, because the mean of its divisors is an integer number (49885875).

Almost surely, 2^745900109 is an apocalyptic number.

It is an amenable number.

745900109 is a deficient number, since it is larger than the sum of its proper divisors (52273891).

745900109 is a wasteful number, since it uses less digits than its factorization.

745900109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1312.

The product of its (nonzero) digits is 11340, while the sum is 35.

The square root of 745900109 is about 27311.1718715986. The cubic root of 745900109 is about 906.9017157648.

The spelling of 745900109 in words is "seven hundred forty-five million, nine hundred thousand, one hundred nine".