70998531 has 4 divisors (see below), whose sum is σ = 94664712. Its totient is φ = 47332352.

The previous prime is 70998503. The next prime is 70998541. The reversal of 70998531 is 13589907.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13589907 = 3 ⋅4529969.

It is a cyclic number.

It is not a de Polignac number, because 70998531 - 2²¹ = 68901379 is a prime.

It is a super-2 number, since 2×70998531² = 10081582808315922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (70998541) 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, 11833086 + ... + 11833091.

It is an arithmetic number, because the mean of its divisors is an integer number (23666178).

Almost surely, 2^70998531 is an apocalyptic number.

70998531 is a deficient number, since it is larger than the sum of its proper divisors (23666181).

70998531 is a wasteful number, since it uses less digits than its factorization.

70998531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23666180.

The product of its (nonzero) digits is 68040, while the sum is 42.

The square root of 70998531 is about 8426.0626036127. The cubic root of 70998531 is about 414.0789191192.

The spelling of 70998531 in words is "seventy million, nine hundred ninety-eight thousand, five hundred thirty-one".