749198987 has 8 divisors (see below), whose sum is σ = 782393856. Its totient is φ = 716055912.

The previous prime is 749198929. The next prime is 749199007. The reversal of 749198987 is 789891947.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-749198987 is a prime.

It is a super-2 number, since 2×749198987² = 1122598244243652338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (749198287) 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, 18248 + ... + 42794.

It is an arithmetic number, because the mean of its divisors is an integer number (97799232).

Almost surely, 2^749198987 is an apocalyptic number.

749198987 is a deficient number, since it is larger than the sum of its proper divisors (33194869).

749198987 is a wasteful number, since it uses less digits than its factorization.

749198987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25897.

The product of its digits is 9144576, while the sum is 62.

The square root of 749198987 is about 27371.4995387538. The cubic root of 749198987 is about 908.2367284817.

The spelling of 749198987 in words is "seven hundred forty-nine million, one hundred ninety-eight thousand, nine hundred eighty-seven".