374998991 has 4 divisors (see below), whose sum is σ = 394735800. Its totient is φ = 355262184.

The previous prime is 374998957. The next prime is 374999021. The reversal of 374998991 is 199899473.

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

It is a cyclic number.

It is not a de Polignac number, because 374998991 - 2¹⁰ = 374997967 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 374998991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (374998931) 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, 9868376 + ... + 9868413.

It is an arithmetic number, because the mean of its divisors is an integer number (98683950).

Almost surely, 2^374998991 is an apocalyptic number.

374998991 is a deficient number, since it is larger than the sum of its proper divisors (19736809).

374998991 is a wasteful number, since it uses less digits than its factorization.

374998991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19736808.

The product of its digits is 4408992, while the sum is 59.

The square root of 374998991 is about 19364.8906787516. The cubic root of 374998991 is about 721.1241383843.

The spelling of 374998991 in words is "three hundred seventy-four million, nine hundred ninety-eight thousand, nine hundred ninety-one".