45198787 has 4 divisors (see below), whose sum is σ = 45307080. Its totient is φ = 45090496.

The previous prime is 45198781. The next prime is 45198809. The reversal of 45198787 is 78789154.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78789154 = 2 ⋅39394577.

It is a cyclic number.

It is not a de Polignac number, because 45198787 - 2¹⁵ = 45166019 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 45198787.

It is not an unprimeable number, because it can be changed into a prime (45198781) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53518 + ... + 54355.

It is an arithmetic number, because the mean of its divisors is an integer number (11326770).

Almost surely, 2^45198787 is an apocalyptic number.

45198787 is a deficient number, since it is larger than the sum of its proper divisors (108293).

45198787 is a wasteful number, since it uses less digits than its factorization.

45198787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108292.

The product of its digits is 564480, while the sum is 49.

The square root of 45198787 is about 6723.0043135491. The cubic root of 45198787 is about 356.2123123361.

The spelling of 45198787 in words is "forty-five million, one hundred ninety-eight thousand, seven hundred eighty-seven".