690005455 has 4 divisors (see below), whose sum is σ = 828006552. Its totient is φ = 552004360.

The previous prime is 690005419. The next prime is 690005461. The reversal of 690005455 is 554500096.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 690005455 - 2⁹ = 690004943 is a prime.

It is a super-2 number, since 2×690005455² = 952215055859514050, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 690005455.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69000541 + ... + 69000550.

It is an arithmetic number, because the mean of its divisors is an integer number (207001638).

Almost surely, 2^690005455 is an apocalyptic number.

690005455 is a deficient number, since it is larger than the sum of its proper divisors (138001097).

690005455 is a wasteful number, since it uses less digits than its factorization.

690005455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138001096.

The product of its (nonzero) digits is 27000, while the sum is 34.

The square root of 690005455 is about 26267.9549070726. The cubic root of 690005455 is about 883.6579209015.

The spelling of 690005455 in words is "six hundred ninety million, five thousand, four hundred fifty-five".