690999265 has 16 divisors (see below), whose sum is σ = 907168896. Its totient is φ = 501107200.

The previous prime is 690999263. The next prime is 690999301. The reversal of 690999265 is 562999096.

It is not a de Polignac number, because 690999265 - 2¹ = 690999263 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (690999263) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1620 + ... + 37210.

It is an arithmetic number, because the mean of its divisors is an integer number (56698056).

Almost surely, 2^690999265 is an apocalyptic number.

It is an amenable number.

690999265 is a deficient number, since it is larger than the sum of its proper divisors (216169631).

690999265 is a wasteful number, since it uses less digits than its factorization.

690999265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35960.

The product of its (nonzero) digits is 2361960, while the sum is 55.

The square root of 690999265 is about 26286.8648758272. The cubic root of 690999265 is about 884.0819594812.

The spelling of 690999265 in words is "six hundred ninety million, nine hundred ninety-nine thousand, two hundred sixty-five".