31400406073 has 4 divisors (see below), whose sum is σ = 31693867920. Its totient is φ = 31106944228.

The previous prime is 31400406061. The next prime is 31400406091. The reversal of 31400406073 is 37060400413.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 37060400413 = 36643 ⋅1011391.

It is a cyclic number.

It is not a de Polignac number, because 31400406073 - 2²⁵ = 31366851641 is a prime.

It is a super-3 number, since 3×31400406073³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31400401073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146730763 + ... + 146730976.

It is an arithmetic number, because the mean of its divisors is an integer number (7923466980).

Almost surely, 2^31400406073 is an apocalyptic number.

It is an amenable number.

31400406073 is a deficient number, since it is larger than the sum of its proper divisors (293461847).

31400406073 is a wasteful number, since it uses less digits than its factorization.

31400406073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293461846.

The product of its (nonzero) digits is 6048, while the sum is 28.

Adding to 31400406073 its reverse (37060400413), we get a palindrome (68460806486).

The spelling of 31400406073 in words is "thirty-one billion, four hundred million, four hundred six thousand, seventy-three".