180997407 has 6 divisors (see below), whose sum is σ = 261440712. Its totient is φ = 120664932.

The previous prime is 180997403. The next prime is 180997409. The reversal of 180997407 is 704799081.

It is not a de Polignac number, because 180997407 - 2² = 180997403 is a prime.

It is a super-2 number, since 2×180997407² = 65520122681447298, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180997403) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10055403 + ... + 10055420.

It is an arithmetic number, because the mean of its divisors is an integer number (43573452).

Almost surely, 2^180997407 is an apocalyptic number.

180997407 is a deficient number, since it is larger than the sum of its proper divisors (80443305).

180997407 is a wasteful number, since it uses less digits than its factorization.

180997407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20110829 (or 20110826 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 45.

The square root of 180997407 is about 13453.5276786425. The cubic root of 180997407 is about 565.6625813354.

The spelling of 180997407 in words is "one hundred eighty million, nine hundred ninety-seven thousand, four hundred seven".