745098985 has 4 divisors (see below), whose sum is σ = 894118788. Its totient is φ = 596079184.

The previous prime is 745098983. The next prime is 745098997. The reversal of 745098985 is 589890547.

745098985 = T₂₂₂₈₆ + T₂₂₂₈₇ + T₂₂₂₈₈.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 282676969 + 462422016 = 16813^2 + 21504^2 .

It is a cyclic number.

It is not a de Polignac number, because 745098985 - 2¹ = 745098983 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (745098983) 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, 74509894 + ... + 74509903.

It is an arithmetic number, because the mean of its divisors is an integer number (223529697).

Almost surely, 2^745098985 is an apocalyptic number.

745098985 is the 22288-th centered triangular number.

It is an amenable number.

745098985 is a deficient number, since it is larger than the sum of its proper divisors (149019803).

745098985 is a wasteful number, since it uses less digits than its factorization.

745098985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149019802.

The product of its (nonzero) digits is 3628800, while the sum is 55.

The square root of 745098985 is about 27296.5013325884. The cubic root of 745098985 is about 906.5769175838.

The spelling of 745098985 in words is "seven hundred forty-five million, ninety-eight thousand, nine hundred eighty-five".