31407629987 has 8 divisors (see below), whose sum is σ = 31623090000. Its totient is φ = 31192232544.

The previous prime is 31407629969. The next prime is 31407629993. The reversal of 31407629987 is 78992670413.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31407629987 - 2¹⁰ = 31407628963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31407629917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1471808 + ... + 1492994.

It is an arithmetic number, because the mean of its divisors is an integer number (3952886250).

Almost surely, 2^31407629987 is an apocalyptic number.

31407629987 is a deficient number, since it is larger than the sum of its proper divisors (215460013).

31407629987 is a wasteful number, since it uses less digits than its factorization.

31407629987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31285.

The product of its (nonzero) digits is 4572288, while the sum is 56.

The spelling of 31407629987 in words is "thirty-one billion, four hundred seven million, six hundred twenty-nine thousand, nine hundred eighty-seven".