690921050 has 24 divisors (see below), whose sum is σ = 1300604256. Its totient is φ = 273037040.

The previous prime is 690921041. The next prime is 690921059. The reversal of 690921050 is 50129096.

It is an interprime number because it is at equal distance from previous prime (690921041) and next prime (690921059).

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 690920998 and 690921016.

It is not an unprimeable number, because it can be changed into a prime (690921059) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 79094 + ... + 87393.

It is an arithmetic number, because the mean of its divisors is an integer number (54191844).

Almost surely, 2^690921050 is an apocalyptic number.

690921050 is a deficient number, since it is larger than the sum of its proper divisors (609683206).

690921050 is a wasteful number, since it uses less digits than its factorization.

690921050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166582 (or 166577 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 690921050 is about 26285.3771135207. The cubic root of 690921050 is about 884.0486014719.

The spelling of 690921050 in words is "six hundred ninety million, nine hundred twenty-one thousand, fifty".