919974901 has 4 divisors (see below), whose sum is σ = 937332972. Its totient is φ = 902616832.

The previous prime is 919974883. The next prime is 919974911. The reversal of 919974901 is 109479919.

It is a happy number.

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 600495025 + 319479876 = 24505^2 + 17874^2 .

It is a cyclic number.

It is not a de Polignac number, because 919974901 - 2⁷ = 919974773 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 (919974911) 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, 8678956 + ... + 8679061.

It is an arithmetic number, because the mean of its divisors is an integer number (234333243).

Almost surely, 2^919974901 is an apocalyptic number.

It is an amenable number.

919974901 is a deficient number, since it is larger than the sum of its proper divisors (17358071).

919974901 is a wasteful number, since it uses less digits than its factorization.

919974901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17358070.

The product of its (nonzero) digits is 183708, while the sum is 49.

The square root of 919974901 is about 30331.0880286217. The cubic root of 919974901 is about 972.5799815707.

It can be divided in two parts, 9199 and 74901, that added together give a square (84100 = 290²).

The spelling of 919974901 in words is "nine hundred nineteen million, nine hundred seventy-four thousand, nine hundred one".