690615801 has 20 divisors (see below), whose sum is σ = 1039099600. Its totient is φ = 457090776.

The previous prime is 690615787. The next prime is 690615823. The reversal of 690615801 is 108516096.

It is not a de Polignac number, because 690615801 - 2¹⁰ = 690614777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (690615301) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 19411 + ... + 41928.

It is an arithmetic number, because the mean of its divisors is an integer number (51954980).

Almost surely, 2^690615801 is an apocalyptic number.

It is an amenable number.

690615801 is a deficient number, since it is larger than the sum of its proper divisors (348483799).

690615801 is a wasteful number, since it uses less digits than its factorization.

690615801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61490 (or 61481 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 690615801 is about 26279.5700307292. The cubic root of 690615801 is about 883.9183913696.

The spelling of 690615801 in words is "six hundred ninety million, six hundred fifteen thousand, eight hundred one".