690374819 has 8 divisors (see below), whose sum is σ = 701663328. Its totient is φ = 679129920.

The previous prime is 690374813. The next prime is 690374849. The reversal of 690374819 is 918473096.

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 690374819 - 2¹⁶ = 690309283 is a prime.

It is a super-2 number, since 2×690374819² = 953234781418565522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (690374813) 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, 21809 + ... + 43085.

It is an arithmetic number, because the mean of its divisors is an integer number (87707916).

Almost surely, 2^690374819 is an apocalyptic number.

690374819 is a deficient number, since it is larger than the sum of its proper divisors (11288509).

690374819 is a wasteful number, since it uses less digits than its factorization.

690374819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21805.

The product of its (nonzero) digits is 326592, while the sum is 47.

The square root of 690374819 is about 26274.9846622220. The cubic root of 690374819 is about 883.8155685450.

The spelling of 690374819 in words is "six hundred ninety million, three hundred seventy-four thousand, eight hundred nineteen".