70964781 has 4 divisors (see below), whose sum is σ = 94619712. Its totient is φ = 47309852.

The previous prime is 70964771. The next prime is 70964801. The reversal of 70964781 is 18746907.

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: 18746907 = 3 ⋅6248969.

It is a cyclic number.

It is not a de Polignac number, because 70964781 - 2¹⁰ = 70963757 is a prime.

It is a super-2 number, since 2×70964781² = 10072000284755922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70964701) 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, 11827461 + ... + 11827466.

It is an arithmetic number, because the mean of its divisors is an integer number (23654928).

Almost surely, 2^70964781 is an apocalyptic number.

It is an amenable number.

70964781 is a deficient number, since it is larger than the sum of its proper divisors (23654931).

70964781 is a wasteful number, since it uses less digits than its factorization.

70964781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23654930.

The product of its (nonzero) digits is 84672, while the sum is 42.

The square root of 70964781 is about 8424.0596507860. The cubic root of 70964781 is about 414.0132962660.

The spelling of 70964781 in words is "seventy million, nine hundred sixty-four thousand, seven hundred eighty-one".