990745951 has 8 divisors (see below), whose sum is σ = 1082882864. Its totient is φ = 900884160.

The previous prime is 990745933. The next prime is 990745969. The reversal of 990745951 is 159547099.

It is an interprime number because it is at equal distance from previous prime (990745933) and next prime (990745969).

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 990745951 - 2⁹ = 990745439 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 990745895 and 990745904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990745451) 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, 567870 + ... + 569611.

It is an arithmetic number, because the mean of its divisors is an integer number (135360358).

Almost surely, 2^990745951 is an apocalyptic number.

990745951 is a deficient number, since it is larger than the sum of its proper divisors (92136913).

990745951 is a wasteful number, since it uses less digits than its factorization.

990745951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1137561.

The product of its (nonzero) digits is 510300, while the sum is 49.

The square root of 990745951 is about 31476.1171525333. The cubic root of 990745951 is about 996.9057525076.

The spelling of 990745951 in words is "nine hundred ninety million, seven hundred forty-five thousand, nine hundred fifty-one".