1520747969 has 8 divisors (see below), whose sum is σ = 1639395072. Its totient is φ = 1402338960.

The previous prime is 1520747947. The next prime is 1520747983. The reversal of 1520747969 is 9697470251.

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

It is a cyclic number.

It is not a de Polignac number, because 1520747969 - 2⁸ = 1520747713 is a prime.

It is a super-3 number, since 3×1520747969³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1520747999) 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, 46139 + ... + 71904.

It is an arithmetic number, because the mean of its divisors is an integer number (204924384).

Almost surely, 2^1520747969 is an apocalyptic number.

It is an amenable number.

1520747969 is a deficient number, since it is larger than the sum of its proper divisors (118647103).

1520747969 is a wasteful number, since it uses less digits than its factorization.

1520747969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119047.

The product of its (nonzero) digits is 952560, while the sum is 50.

The square root of 1520747969 is about 38996.7686994705. The cubic root of 1520747969 is about 1149.9679812131.

The spelling of 1520747969 in words is "one billion, five hundred twenty million, seven hundred forty-seven thousand, nine hundred sixty-nine".