897421730 has 16 divisors (see below), whose sum is σ = 1634822784. Its totient is φ = 354643440.

The previous prime is 897421673. The next prime is 897421769. The reversal of 897421730 is 37124798.

It is a super-2 number, since 2×897421730² = 1610731522952385800, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 539786 + ... + 541445.

It is an arithmetic number, because the mean of its divisors is an integer number (102176424).

Almost surely, 2^897421730 is an apocalyptic number.

897421730 is a deficient number, since it is larger than the sum of its proper divisors (737401054).

897421730 is a wasteful number, since it uses less digits than its factorization.

897421730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1081321.

The product of its (nonzero) digits is 84672, while the sum is 41.

The square root of 897421730 is about 29956.9980138197. The cubic root of 897421730 is about 964.5665426915.

The spelling of 897421730 in words is "eight hundred ninety-seven million, four hundred twenty-one thousand, seven hundred thirty".