691427100 has 576 divisors, whose sum is σ = 2737602560. Its totient is φ = 130636800.

The previous prime is 691427089. The next prime is 691427117. The reversal of 691427100 is 1724196.

It is a happy number.

691427100 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×691427100² = 956142869228820000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 16079679 + ... + 16079721.

Almost surely, 2^691427100 is an apocalyptic number.

691427100 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 691427100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1368801280).

691427100 is an abundant number, since it is smaller than the sum of its proper divisors (2046175460).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

691427100 is a wasteful number, since it uses less digits than its factorization.

691427100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130 (or 123 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 691427100 is about 26295.0014261266. The cubic root of 691427100 is about 884.2643828150.

The spelling of 691427100 in words is "six hundred ninety-one million, four hundred twenty-seven thousand, one hundred".