79961629 has 4 divisors (see below), whose sum is σ = 87230880. Its totient is φ = 72692380.

The previous prime is 79961621. The next prime is 79961653. The reversal of 79961629 is 92616997.

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: 92616997 = 11 ⋅8419727.

It is a cyclic number.

It is not a de Polignac number, because 79961629 - 2³ = 79961621 is a prime.

It is a super-2 number, since 2×79961629² = 12787724224667282, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79961621) 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, 3634609 + ... + 3634630.

It is an arithmetic number, because the mean of its divisors is an integer number (21807720).

Almost surely, 2^79961629 is an apocalyptic number.

It is an amenable number.

79961629 is a deficient number, since it is larger than the sum of its proper divisors (7269251).

79961629 is a wasteful number, since it uses less digits than its factorization.

79961629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7269250.

The product of its digits is 367416, while the sum is 49.

The square root of 79961629 is about 8942.1266486222. The cubic root of 79961629 is about 430.8180371448.

The spelling of 79961629 in words is "seventy-nine million, nine hundred sixty-one thousand, six hundred twenty-nine".