9975951629 has 4 divisors (see below), whose sum is σ = 11401087584. Its totient is φ = 8550815676.

The previous prime is 9975951589. The next prime is 9975951649. The reversal of 9975951629 is 9261595799.

It is a happy number.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9975951629 is a prime.

It is a super-2 number, since 2×9975951629² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9975951649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 712567967 + ... + 712567980.

It is an arithmetic number, because the mean of its divisors is an integer number (2850271896).

Almost surely, 2^9975951629 is an apocalyptic number.

It is an amenable number.

9975951629 is a deficient number, since it is larger than the sum of its proper divisors (1425135955).

9975951629 is a wasteful number, since it uses less digits than its factorization.

9975951629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1425135954.

The product of its digits is 13778100, while the sum is 62.

The square root of 9975951629 is about 99879.6857674272. The cubic root of 9975951629 is about 2152.7062822868.

The spelling of 9975951629 in words is "nine billion, nine hundred seventy-five million, nine hundred fifty-one thousand, six hundred twenty-nine".